OUTBOARD

I. adjective Date: circa 1823 situated ~, having, using, or limited to the use of an ~ motor, II. adverb Date: circa 1848 outside a ship's bulwarks ; in a lateral direction from the hull, in a position closer or closest to either of the wingtips of an airplane or to the sides of an automobile, III. noun Date: 1935 ~ motor , a boat with an ~ motor