geographic feature mountain pass A lower point that allows easier access through a mountain range. A pass has the general form of a saddle between two mountains. ENVO ENVO:00000084 EcoLexicon:mountain_pass FTT:510 FTT:612 FTT:738 FTT:739 FTT:740 Geonames:T.GAP Geonames:T.PASS Geonames:T.SDL SWEETRealm:Pass TGN:21433 TGN:21436 TGN:21524 Wikipedia:Mountain_pass col defile gap notch pass pass saddle saddle (physiographic) sill (physiographic)