phd
n. countablen. the highest degree you can earn from a university. It shows that you have done original research and are an expert in your subject.
n. the highest academic degree awarded by a university, typically requiring several years of original research and the successful defense of a thesis. Often used as a title for those who have completed a doctoral program.
She is studying hard to finish her PhD.
After five years of intensive research in the laboratory, he finally submitted his PhD thesis for review.
While a master's degree provides specialized knowledge, a PhD requires the candidate to make a significant and original contribution to their field through rigorous academic inquiry.
Often used with the verb 'to hold' or 'to earn'. When used as a title, it follows the person's name, usually separated by a comma.
She is a PhD.She has a PhD.The word refers to the degree itself, not the person who holds it; use 'has' or 'is a PhD student'.