- that may be permitted especially as according to rule; "permissible behavior in school"; "a permissible tax deduction"
- that may be accepted or conceded; "a kind of speculation that was permissible in cosmology but inadmissible in medicine"
- (permissibility) admissibility as a consequence of being permitted
- a type of high explosive that functions with low flame temperature and minimal duration, making it safe in coal mining and other conditions where flammable gas or dust may be present