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: allowable
Definition: deductible according to the tax laws
Antonyms: nondeductible
Definition: not allowable as a deduction
Main entry: allowable
Definition: deserving to be allowed or considered
Antonyms: inadmissible
Definition: not deserving to be admitted