The Oxford Thesaurus An A-Z Dictionary of Synonyms - externaladj.

1) outer, outside, outward, exterior: This medication is for external use only. 2) outside, exterior, extrinsic, extraneous, alien, foreign, exotic: Do not ignore the external influences on the nation's economy. 3) apparent, visible, perceptible, superficial, surface: The external features of the planet barely suggest what lies within.