out·rig·ger / ˈoutˌrigər/ • n. a beam, spar, or framework projecting from or over the side of a ship or boat. ∎  a float or secondary hull fixed parallel to a canoe or other boat to stabilize it. ∎  a boat fitted with such a structure. ∎  a similar projecting support in another structure or vehicle.DERIVATIVES: out·rigged / -ˌrigd/ adj.

outrigger

outrigger (naut.) in various senses preceded by, and perh. an alt., by assoc. with RIG, of †outligger (XV) ‘outlier’.