Main entry: allowable, permissible
Definition: that may be permitted especially as according to rule
Usage: permissible behavior in school; a permissible tax deduction
Antonyms: impermissible
Definition: not permitted
Main entry: permissible
Definition: that may be accepted or conceded
Usage: a kind of speculation that was permissible in cosmology but inadmissible in medicine
Antonyms: inadmissible
Definition: not deserving to be admitted