spinnaker UK /ˈspɪnəkə/US /ˈspɪnəkɚ/noun 1verb 1forms 3 noun1 •A sail supplemental to the mainsail, especially a triangular one, used on yachts for running before the wind. verb1 •To sail using a spinnakerWe spinnakered out into the Atlantic and, fortunately, the wind died as night fell. — 2010 formsspinnakered · spinnakering · spinnakers
