grad ‧ u ‧ a ‧ tion /ˌɡrædʒuˈeɪʃ ə n/ BrE AmE noun
1 . [uncountable] the time when you complete a university degree course or your education at an American ↑ high school :
After graduation Neil returned to Ohio.
On graduation (=after completing a first degree) , Nancy became an art teacher.
2 . [uncountable] a ceremony at which you receive a university degree or a ↑ diploma from an American ↑ high school :
graduation day
3 . [countable] a mark on an instrument or container used for measuring