PhD stands for Doctor of Philosophy, derived from the Latin Philosophiæ Doctor. It is one of the highest academic degrees awarded by universities worldwide, signifying expertise in a specific field of study. The PhD journey involves extensive research, coursework, and the creation of original knowledge through a dissertation or thesis. Typically taking 3-7 years to complete, a PhD is awarded upon successfully defending one's research. While "philosophy" refers to the broad pursuit of knowledge, the degree can be earned in various disciplines, including science, humanities, engineering, and social sciences.