Chiefly Sc. [Of doubtful origin: perh. a. LG. snibbe (G. schnippe), snib (Sw. snibb) beak, beak-like point, etc.] A catch or fastening for a door, window, lock, or the like.
1825. Jamieson, Suppl., s.v., The snib is the small bolt placed under the latch, and fastening the door so that it cannot be opened from without.
1869. N. & Q., 4th Ser. IV. 467/2. Most doors have both a snib and a sneck.
1891. Barrie, Little Minister, xxii. An unearthly hand presses the snib of the window, the latch rises.