backwind I. \ˈ ̷ ̷| ̷ ̷\noun Etymology:back (III) + wind : a wind blowing onto the wrong side of a sail; especially: one directed upon a mainsail by a wrongly trimmed jib II. transitive verb 1.: to direct a backwind upon < a jib thus bellied is most apt to backwind the mainsail > 2.: to sail to windward of (another sailing ship) so as to blanket or interfere with the wind < backwind his opponent in a yacht race >