school principal schoolp·rin·ci·pal fairly common noun 1. the educator who has executive authority for a school “she sent unruly pupils to see the principal” Synonymsprincipalschool principalhead teacherhead Related words Broader terms educator Narrower terms chancellorheadmasterheadmistress WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.