Definition of "postgraduate" [post•grad•u•ate]

• Of, relating to, or pursuing advanced study after graduation from high school or college. (adjective)
• One who is engaged in postgraduate study. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Because postgraduate is so often used interchangeably with graduate, it would be unrealistic to insist that the two must be different and that postgraduate means what you and I think it does (what it should!)."
• "But postgraduate is actually better established than these pre - words."
• "I also recall my visits to the ranch in the years of 1958 and 1959, a postgraduate from the Soviet Union, a Jack London student of Moscow State University and UC-Berkeley, together with Vice-Chancellor of the University James Hart and famous literary scholar Franklin Walker."