1. deductible according to the tax laws (Freq. 3) • Similar to: deductible 2. that may be permitted especially as according to rule - permissible behavior in school - a permissible tax deduction • Syn: permissible • Ant: impermissible (for: permissible) • See Also: tolerable • Derivationally related forms: permit (for: permissible), permissibility (for: permissible) 3. deserving to be allowed or considered • Similar to: admissible • Derivationally related forms: allow