—n. a part of a sail that is rolled and tied down to reduce the area exposed to the wind.
—v.t. 1. to shorten (sail) by tying in one or more reefs.
2. to reduce the length of (a topmast, a bowsprit, etc.), as by lowering, sliding inboard, or the like.
3. to pull (old oakum) out of seams, as with a rave hook (often fol. by out).