n. & v. (also loof) Naut.
n. 1 the edge of the fore-and-aft sail next to the mast or stay. 2 Brit. the broadest part of the ship's bow where the sides begin to curve in.
v.tr. (also absol.) 1 steer (a ship) nearer the wind. 2 turn (the helm) so as to achieve this. 3 obstruct (an opponent in yacht-racing) by sailing closer to the wind. 4 raise or lower (the jib of a crane or derrick).
[ ME lo(o)f f. OF lof, prob. f. LG ]