Latch, n. [OE. lacche, fr. lacchen to seize, As. læccan.] 1. That which fastens or holds; a lace; a snare. Rom. of R.
2. A movable piece which holds anything in place by entering a notch or cavity; specifically, the catch which holds a door or gate when closed, though it be not bolted.
3. (Naut.) A latching.
4. A crossbow. Wright.