Meaning of the word key in English

What does key mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

key

US /kiː/

UK /kiː/

a small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into a lock and turned to open or close it.

Example:

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I can't find my car keys.

•

She locked the door and put the key in her pocket.

Synonym:

opener unlocker

a thing that is of crucial importance to a situation, problem, or explanation.

Example:

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Communication is the key to a successful relationship.

•

The detective found the key piece of evidence.

Synonym:

crucial essential vital critical pivotal

of crucial importance.

Example:

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This is a key decision for the company's future.

•

He played a key role in the negotiations.

Synonym:

crucial essential vital critical pivotal