Synonyms for lock

noun

1. A device for locking

   hook, catch, latch, bolt, bar, staple, hasp, clinch, bond, fastening, padlock, safety catch, clamp, holdfast, clasp, link, junction, connection, barrier, canal gate, device, fixture, grip, grapple; see also fastener.

   Types of locks include: deadbolt, double-cylinder, single-cylinder, tumbler, pin-tumbler cylinder, sash ward, fine ward, solid ward, lever, safety lever, keyless, combination, cabinet, duplex key, action, rim, mortise, padlock, timelock.

2. A tuft or ringlet of hair

   tuft, tress, ringlet, bunch, twist, portion of hair, snip, braid, plait; see also curl, hair 1.

under lock and key

verb