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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.

Of crucial importance; significant: key decisions; the key element of the thesis.

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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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.

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. They put the key in the door and entered.

Whether it’s a broken lock, a snapped key, a misplaced key, or trouble getting into your home, vehicle, or business, we’re ready to come to you. If it involves locks, keys, or security and it’s disrupting your …

The usual type of key is a small metal object that you insert into a narrow opening and turn.

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