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What Does 'PhD' Stand For?

A PhD is a terminal academic degree students typically pursue when they're interested in an academic or research career.

[Featured Image] A PhD student works on his laptop while listening to over-the-ear headphones.

A PhD is the highest possible academic degree a student can obtain. It stands for “Doctor of Philosophy,” which refers to the immense knowledge a student gains when earning the degree. Students typically pursue a PhD when they're interested in an academic or research career—or if they want to take their education as far as it can go.

This article goes beyond the definition of a PhD, and touches on important information you’ll need to know about the degree, so you can decide whether pursuing one is the best choice for you. 

What is a PhD? 

A PhD is an academic degree that combines general knowledge of a field with specific mastery of an area of subtopic within that field. For example, earning your PhD in political science means you have a general foundation of the field, but likely also specialize in a more focused area, such as American or comparative politics, or political economy. 

PhDs—also known as doctorates—are terminal degrees , meaning they are the highest level of degree that you can achieve in certain fields, such as cognitive psychology, mathematics, English, economics, evolutionary biology, and public health. 

What does it take to earn a PHD? 

PhD programs typically require you to complete advanced coursework, a comprehensive exam that tests your knowledge of your particular field, and a dissertation (or original body of research), though the specific requirements will differ by program or university.  

How long does a PhD take?

It takes between four and seven years to earn your doctorate, though it often depends on what you study. For example, it typically takes less than seven years to earn an engineering PhD, while it can take up to 12 years to earn an education PhD. Writing a dissertation is often credited with adding to the length of time it takes to complete a PhD program.

Learn more: How Long Does It Take to Get a PhD?

PhDs vs. other terminal degrees

A PhD is not the only kind of terminal degree you can earn. In fact, there are two other types of terminal degrees that tend to be more career focused.

Professional doctorates

PhDs and professional doctorates are similar in that they are both the most advanced academic degrees you can earn, but a PhD requires a dissertation and a professional doctorate requires a doctoral study. 

PhDs are focused on producing original research, whereas professional doctorates typically have some professional experience they apply toward researching a solution to a practical problem. If you have significant experience in a professional field, such as business administration or public health, you might choose to pursue a professional doctorate because you can use your knowledge and expertise in more concrete ways. 

Professional degrees

A professional degree is the PhD equivalent for certain professions, like for a medical doctor, dentist, or lawyer. Whereas a PhD tends to promote a historical and theoretical education, a professional degree emphasizes a practical education because it’s designed for you to begin working in medicine or law after you graduate and pass additional licensing requirements. 

Education requirements for a PhD 

Obtaining your PhD requires earning your bachelor’s degree and likely your master’s degree before you can begin applying to doctorate programs. However, there are some programs that combine the master’s degree with the PhD so that you spend less time earning both and can begin once you finish your bachelor’s degree. 

Let's look at the two most important degrees you’ll need to complete before you can begin pursuing your PhD.

Bachelor’s degree

You will need to earn a bachelor’s degree before pursuing more advanced degrees, like a master’s or PhD. You don’t have to choose a major related to your eventual doctorate, though it can help to pick a complementary subject so you have a strong foundation before taking higher-level coursework. For example, if you want to obtain a PhD in economics, then it might help to major in economics, finance, business, or even political science as an undergraduate. 

While graduate programs don’t always expect applicants to have studied the same field as the one they’re applying to, you will need to explain your interest in the field of your potential graduate work and have some knowledge about what you want to study within it. Aligning your undergraduate and graduate focuses may also help you move through your graduate coursework faster.  

Learn more: How to Get a Bachelor’s Degree

Master’s degree

A master’s degree is an advanced degree you can pursue after earning your undergraduate degree. PhD programs typically require a master’s before admitting you, though as we noted above, some programs may combine degree tracks to decrease the amount of time to completion.

Master’s degrees take between one and three years to finish , depending on whether you’re able to attend part-time or full-time. Master’s degrees enhance your level of expertise in your field, and you can pursue many higher-level careers with the credential—or continue with your education and apply to PhD programs. 

Learn more: Is a Master’s Degree Worth It?

Benefits of a PhD 

There are a number of reasons why you might want to pursue your PhD. Let’s hone in on four of them: 

Become an expert

People who obtain PhDs have the highest possible education in their field. As such, they're often considered to be genuine experts in that subject matter. You may feel a tremendous amount of personal satisfaction from having achieved this level of mastery.

Contribute original research 

Adding to the knowledge of a particular field is no small feat. When you write your dissertation, you will have the opportunity to make a valuable original contribution that either expands people’s understanding of a subject or brings an entirely new perspective to it.

Broaden your job opportunities

Earning a PhD could qualify you to work in academia or research, but it may also increase your qualifications—or help you stand out—for jobs that do not necessarily require a PhD. Holding a PhD may convey to employers that you’re knowledgeable, hardworking, and disciplined because of what it takes to earn the degree. 

Increased salary potential

On average, people with PhDs can potentially make more than those with undergraduate degrees, depending on your profession. The median weekly earnings of a person with a PhD in the United States is $1,885 compared to $1,305 for bachelor's degree holders [ 1 ]. A doctorate can also lead to higher lifetime earnings. A bachelor’s degree graduate will earn an average of $2.3 million over their lifetime, but PhD graduates earn an average of $3.3 million over their lifetimes [ 2 ].

Careers that typically require a PhD

A PhD is an academic credential necessary to teach at the university level or conduct high-level research in a number of fields, such as the life and social sciences. The following careers typically require a doctorate:

Research associate

Research scientist 

Assistant professor 

Dean of students

Careers where a PhD may help you advance  

While the careers listed below generally require a master’s degree, according to the BLS, earning your PhD may help you qualify for more advanced roles within the profession—or help you develop more specialized knowledge to succeed in your career [ 3 ].  



Political scientist 


Explore further

If you're contemplating getting your PhD and have not yet earned your master’s, explore a number of master’s degree options from prestigious universities in high-growth fields, such as computer science , business , management , or public health . Work toward your degree at your own pace from anywhere with an internet connection.

Related articles

How Long Does It Take to Get a PhD?

A Guide to Professional Degrees

GMAT vs. GRE: Which Should I Take?

Should You Go Back to School? 7 Things to Consider

How Many Credits Do You Need to Graduate?

Article Sources

1.  US Bureau of Labor Statistics.S. Bureau of Labor Statistics. “ Education Pays, 2020 : Career Outlook , https://www.bls.gov/careeroutlook/2021/data-on-display/education-pays.htm." Accessed January 26, 2022.

2. MDSD. “ Executive Summary: the College Payoff ,   https://www.mdsd.org/cms/lib/ID01904072/Centricity/domain/119/documents/The%20Collegepayoff-summary.pdf." Accessed January 26, 2022.

3. US Bureau of Labor Statistics. “ Home , https://www.bls.gov/." Accessed January 26, 2022.

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Types of PhD

When is a 'PhD' not a PhD? When it's a DPhil, DBA, EdD or other type of doctorate degree.

The traditional PhD (or 'Doctor of Philosophy') is the best-known advanced research qualification, but several other varieties of doctoral degree exist. Some of these are academic qualifications in specific subject areas. Others are professional doctorates with a slightly different format.

The way in which candidates study for a PhD is also becoming more varied, with the opportunity to research part time or even pursue a joint doctorate degree , awarded by more than one university.

But there's no need to be confused. This page explains and compares the options available to you.

Not sure where to start? Read our step by step guide to finding the right PhD .

phd study full form

Designed for experienced managers and business leaders, the DBA is a prestigious and highly-specialised professional doctoral degree.

phd study full form

Ideal for senior teachers and policy makers, an Education Doctorate combines advanced training with original research.

phd study full form

Joint PhD programmes involve collaboration between two (or more) different universities. So how does that work? Who can apply? And what are the advantages (and disadvantages) of researching in this way?

phd study full form

Integrated PhD programmes consist of a one-year Masters followed by three years of PhD research. Find out more about what it's like to study an integrated PhD, how to apply and the funding options available.

phd study full form

Thinking of applying for the Doctor of Engineering (EngD)? Our guide covers everything you need to know about the qualification, including costs, applications, programme content, and how it differs from a PhD.

The DBA and the PhD are both doctoral degrees that are equal in academic status – so how do you choose between the two? Our guide explains the differences.

Comparing PhD types

Wondering which type of doctorate degree is right for you? The following table offers a quick overview of the most common types of PhD and other doctorates:

Please note that this table doesn't include every type of doctorate. Many other subjects (and countries ) award their own specific qualifications, but we've covered some of the most popular here.

You can more about some of these degree types in our guide to different varieties of doctorate .

Understanding this table

The doctorates in the above table are divided into different types, as follows:

As a prospective postgraduate student, you only really need to concern yourself with academic or professional research degrees.

We've included higher and honorary doctorates here in order to try and prevent them being confused with more 'conventional' PhDs (and to give you some inspiration for later in your career!).

DPhil vs PhD

Many people believe that the DPhil and PhD are different degrees. This is not true. ‘DPhil’ is an abbreviation of ‘Doctor of Philosophy’. Essentially, ‘DPhil’ and ‘PhD’ are two different ways of referring to the same doctoral degree.

‘DPhil’ is traditionally a British term and so only a few universities (most notably, the University of Oxford) still use it. Most universities around the world use the term ‘PhD’. While you might have to explain to a foreign employer what a DPhil is, you can be safe in the knowledge that both degrees are the same prestigious Doctor of Philosophy award.

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  1. What Does 'PhD' Stand For?

    A PhD is the highest possible academic degree a student can obtain. It stands for “Doctor of Philosophy,” which refers to the immense knowledge a student gains when earning the degree. Students typically pursue a PhD when they're interested in an academic or research career—or if they want to take their education as far as it can go.

  2. Doctor of Philosophy

    A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: philosophiae doctor or doctor philosophiae) is the most common degree at the highest academic level awarded following a course of study and research. PhDs are awarded for programs across the whole breadth of academic fields.

  3. What is a PhD?

    A PhD (Doctor of Philosophy) is a doctoral research degree and the highest level of academic qualification you can achieve. A PhD degree normally takes between three and four years of full-time work to complete. You'll research and write a thesis offering an original contribution to your subject.

  4. PhD Types

    When it's a DPhil, DBA, EdD or other type of doctorate degree. The traditional PhD (or 'Doctor of Philosophy') is the best-known advanced research qualification, but several other varieties of doctoral degree exist. Some of these are academic qualifications in specific subject areas.

  5. PhD [Doctor of Philosophy]: Admission, Degree, Online

    PhD (Doctor of Philosophy) is the highest degree or a doctorate awarded for research in a particular subject. PhD course duration is 3 – 5 years. PhD degree requirements is to have a master’s degree or an MPhil with a minimum aggregate score of 55%. PhD admission is based on PhD entrance exams.