The weather-gauge. The part of a vessel towards the wind. A
sailing close to the wind. (Dutch, loef, a weather-gauge.)
is to turn the head of a ship towards the wind. Luff!- i.e.
Put the tiller on the leeside. This is done to make the ship sail
nearer the wind. Luff round!
Throw the ship's head right into
Same as luff round.
A ship is said to spring her luff when she yields to the helm
by sailing nearer the wind.
Keep the luff.
The wind side.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894