2. A gate which closes off a section of a waterway, such as a canal, in which vessels in transit are raised or lowered by raising or lowering the water level of that part: After Shelby and Fred paid their fees, the master of the lock allowed them to move their boat into the lock and raised them to the next level of the river.
3. A ringlet or small bunch of hair: Craig carried a lock of Estella's hair to remind himself how much he missed her.
The controller of the lock used an electric key to unlock the lock between the river and the loch.
2. A lock which has a magnetically coded key about the size of a credit card.
In one version, developed for hotels and motels, the lock code can be changed electronically from a central console, or a physical control panel on a computer or electronic device, as soon as a guest checks out, with a simultaneous preparation of new coded keys.
Don’t lock the barn door after the horse is stolen.
Of little value his compunctions
Who assumes clavinous functions
When once from circumambient pen,
Is snatched its equine denizen.