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KEY definition: 1. a piece of metal that has been cut into a special shape and is used for opening or closing a…. Learn more.
: a usually metal instrument that is used to open a lock or to start or access a mechanism. my house/car keys. turned the key in the lock/ignition. … a metallic rattle, like keys being jangled. Derwent May. b. : something that resembles a key in form or function. a key for winding a clock.
a pin, bolt, wedge, or other piece inserted in a hole or space to lock or hold parts of a mechanism or structure together; a cotter. a small piece of steel fitting into matching slots of a hub of a wheel or the like and the shaft on which the wheel is mounted so that torque is transmitted from one to the other.
A key is a piece of metal that fits inside a lock and turns to open it. You might have a key ring with a house key, a car key, and maybe several more keys.
A key is a specially shaped piece of metal that you place in a lock and turn in order to open or lock a door, or to start or stop the engine of a vehicle.
1. a. A notched and grooved, usually metal implement that is turned to open or close a lock. b. A similar implement or an electronic device used for opening, winding, or starting something: the key of a wind-up alarm clock; the new car's electronic key. c. A device, such as a wedge or pin, inserted to lock together mechanical or structural parts.
key. noun [ C ] us / kiː / uk / kiː / key noun [C] (LOCK) Add to word list. A1. a piece of metal that has been cut into a special shape and is used for opening or closing a lock, starting a car engine, etc.: car / door keys. Ragnar Schmuck/GettyImages. Fewer examples. She fumbled around in her purse, looking for her key.
