outboard adjective 3noun 3forms 1 adjective3 •Situated outside the hull of a vessel. •Positioned away from the centre line of a ship or aircraft.The outboard bales in each tier should be placed on their edges so that their flats will be presented to the sweat battens. This precaution is necessary to lessen the damage in case of chafage. — 2024 •Being or relating to an external effects unit such as compressor or equalizer. noun3 •An outboard motor. •A vessel fitted with an outboard motor. •A studio having outboard gear (compressor, equalizer, etc.). formsoutboards