gunnage noun3 •The number of guns carried by a warship.The gunnage shown does not necessarily mean that a ship had that exact number of guns; gunnage was an administrative formula for the computation of the size of the crew. — 1985 •The size of the guns on a warship. •(historical) A bounty or prize paid to the captors of an enemy ship, based on the number of guns on that enemy ship.