An act of admitting a person to an institution, group, etc.; an instance of being admitted, esp. to an educational or medical institution.

A fixed (maximum) number of entrants admissible to an academic institution. Also: a restricted number of educational places allocated to a particular…

the policy of a college, university, or university system to admit as a student any person who meets various basic requirements, such as…

the prerogative, granted to students or their parents, to choose which school to attend from a range of available options; (also) = open admission n.