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3 days ago · The meaning of KEY is a usually metal instrument that is used to open a lock or to start or access a mechanism. How to use key in a sentence.

KEY definition: a small metal instrument specially cut to fit into a lock and move its bolt. See examples of key used in a sentence.

Common uses Key (cryptography), a piece of information needed to encode or decode a message Key (instrument), a component of a musical instrument Key (lock), a device used to operate a lock Key …

Define key. key synonyms, key pronunciation, key translation, English dictionary definition of key. n. pl. keys 1. a. A notched and grooved, usually metal implement that is turned to open or close a lock. b. …

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.

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Definition of key noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Key definition: A determining factor in accomplishing or achieving something.

Discover the word "KEY" in English: definitions, translations, synonyms, pronunciations, examples, and grammar insights - all in one complete resource.