n. A fork or forking; a point or line of divergence or parting, as of two legs or branches: as, the crotch of a tree (the point of separation of the main stem into two parts); a piece of timber with a crotch.n. A shepherd's crook.n. Nautical, same as crutch, 3 .n. In billiards, a space, generally 4½ inches square, at a corner of the table.In logging, to cut notches on opposite sides of (a log) near the end, into which dogs are fastened.