An instrument by means of which the bolt of a lock is shot or drawn; usually, a removable metal instrument fitted to the mechanism of a particular lock and operated by turning in its place.
That part of a mechanism which serves to lock up, make fast, or adjust to position.
A bar, pin or wedge, to secure a crank, pulley, coupling, etc., upon a shaft, and prevent relative turning; sometimes holding by friction alone, but more frequently by its resistance to shearing, being usually embedded partly in the shaft and partly in the crank, pulley, etc.
The device which activates the lock mechanism or cylinder.
A small blocked usually fitted in a notch between a shaft and a hub to prevent slippage of the two parts.
Anything that operates a locking mechanism, or that prevents the movement of parts on each other; such as the central stone of an arch or vault. A piece inserted in a longitudinal slot in a shaft to prevent a pulley or gear from slipping; a piece inserted in the back of a board to keep it from warping; a hand tool for controlling a valve, moving a nut, etc.
Metallic load transmitting members placed in a groove between the shaft and hub.
A small removable device for operating the mechanism of its own lock.
metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated
provide with a key; "We were keyed after the locks were changed in the building"
1] A parallel-sided piece inserted into a groove cut part way into each of two parts, which prevents slippage between the two parts and they rotate together. Used to secure gears, pulleys, cranks, handles, etc.  A metal instrument for turning locks and key-operated switches.  An L-shaped tool for turning recessed screws (e.g., Allen key).  A roughened surface which provides a basis for subsequent layers of paint or filler.  To adhere to a lower layer.  The act of a vandal who scratches the finish of a car with his key or other sharp instrument. Also see allen key, Allen wrench, car key, drain plug key, feather key, flat key, gib-head key, half-moon key, hexagon key, hex key, ignition key, kennedy key, nordberg key, P&W key, parallel key, Pratt and Whitney key, primary key, secondary key, square key, valve key, and woodruff key.
A key in your hand signifies a mild flirtation. Dreaming of putting a key in a lock means you will be rebuked by someone you like.
1. Groove in the top of a footing. 2. Cross section piece of metal, square or rectangular shaped, which secures interlocking parts by fitting into a groove or shaft and may be used to fasten a wheel or pulley to a shaft.
(n.) A notched and grooved, usually metal implement that is turned to open or close a lock. Source: Dictionary.com (n.) A properly combinated device which is, or most closely resembles, the device specifically intended by the lock manufacturer to operate the corresponding lock. Source: Lock Industry Standards and Training (LIST) Council
( Real Estate Glossary) - A groove in the top of a footing.
(n) A fastening device used to attach shafts to transmit power to gears, pulleys, and other mechanical devices. Common keys are plain, gib head, Woodruff, and Pratt & Whitney. The key is placed into a groove cut into the shaft (the keyseat) and one cut into the hub (the keyway), aligning and locking the parts together. Standard keys are specified using the size of the shaft as the determining factor.
A key is a device which is used to open a lock. It usually consists of a specially-shaped piece of flat metal, with cut notches (forming teeth), and/or milled grooves which fit the shape of the lock and can open the correctly combinated lock by (usually) being turned in the lock housing. This portion of the key is referred to as the blade.