aft UK /ɑːft/US /æft/adjective 1adverb 1forms 7 adjective1 •located at the back of a boat, ship, or airplane adverb1 •At, near, or towards the stern of a vessel (with the frame of reference within the vessel). formsafts · farther aft · further aft · more aft · farthest aft · furthest aft · most aft