Added 10 October 2026 outboard noun Categories: ThingsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about outboard at Wordnik → Where our words come from → A motorboat with an outboard motor. Internal-combustion engine that mounts at stern of small boat. adjective Located away from the midline of a vessel or aircraft. the outboard section of a wing Related Words: portableinboardspeedboatcrosswindfieldoverseasoutdoorsideoutsideoutwardexteriorouter Back to today's word