Longman Dictionary of Contemporary English
postsecondary
adjective
EXAMPLES FROM OTHER ENTRIES
▪ postsecondary education
EXAMPLES FROM CORPUS
▪ And the postsecondary education expenses of their children will be covered for four years.
▪ For managers of audiovisual, graphics, and other more technical activities, postsecondary technical school training is preferred.
▪ Many individuals also attend training and educational programs sponsored by industry associations, often in collaboration with postsecondary institutions.
Wiktionary
postsecondary
a. (context education US and Canada English) Of or pertaining to education or educational institutions subsequent to secondary school or high school.