'Permissible' definitions:

Definition of 'permissible'

From: WordNet
adjective
That may be permitted especially as according to rule; "permissible behavior in school"; "a permissible tax deduction" [syn: permissible, allowable] [ant: impermissible]
adjective
That may be accepted or conceded; "a kind of speculation that was permissible in cosmology but inadmissible in medicine"

Definition of 'Permissible'

From: GCIDE
  • Permissible \Per*mis"si*ble\, a. That may be permitted; allowable; admissible. -- {Per*mis"si*ble*ness}, n. -- {Per*mis"si*bly}, adv. [1913 Webster]