graduate in

graduate in (something)

To complete one's studies in a particular subject. It took six years, but I finally graduated in biology.
See also: graduate
Farlex Dictionary of Idioms.

graduate in

v.
To complete the requirements of an institution and receive an academic degree in some subject: I graduated in mathematics from the local community college.
See also: graduate
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • out of one's
  • on one's
  • on someone's
  • (Have you) been OK?
  • at one's
  • at someone's
  • (I've) got to go
  • (some city's) finest
  • save someone's skin
  • (I'm) (so) glad you could come