bay An area of water bordered by land on three sides. ENVO ENVO:00000032 EcoLexicon:bay FTT:190 FTT:232 FTT:235 Geonames:H.BAY Geonames:H.BAYS Geonames:H.BGHT SWEETRealm:Bay TGN:21121 TGN:21123 TGN:21127 Wikipedia:Bay bahia bay bight embayment firth geo gulf inlet sea loch sea lough coastal inlet