adjective. Existing or conducted between or among schools.

Between schools: as, interscholastic games.

adjective. Involving two or more schools.

adjective. used of competition or cooperation between secondary schools

"Only 8 in 10,000 -- still less than one tenth of one percent--of high school senior boys playing interscholastic football will eventually be drafted by an NFL team."

extramural  

anaplastic  bombastic  desmoplastic  drastic  dynastic  

abig  epostal  hall-style  inter-departmental  intercollegiate