key

noun
UK: /kiː/
US: /kiː/

  1. A metal object used to open or close a lock.

    1. I lost my key this morning, so I can't open the door. [ ] [ ]
    2. The security guard used his key to access the restricted area, ensuring safety protocols. [ ] [ ]

  2. Something that provides a solution or access to understanding something.

    1. Honesty is the key to any good relationship. [ ] [ ]
    2. Understanding the data is key to making informed decisions about the project's future. [ ] [ ]

  3. A set of notes in music based on a particular note.

    1. The song is written in the key of C major. [ ] [ ]
    2. The pianist modulated the key to create a more dramatic effect, showcasing her skill. [ ] [ ]

Synonyms

solution important essential answer critical explanation
key verb

  1. To enter or operate something using a keyboard or keys.

    1. Please key in your password to access the system. [ ] [ ]
    2. The operator carefully keyed the data into the computer, ensuring accuracy and efficiency. [ ] [ ]

  2. To damage a car by scratching it with a key.

    1. Someone keyed his car last night in the parking lot. [ ] [ ]
    2. Vandalism is never acceptable, and keying a car causes unnecessary damage and distress. [ ] [ ]
key adjective

  1. Of crucial importance; very significant.

    1. He played a key role in the company's success. [ ] [ ]
    2. Identifying the root cause of the problem is a key step towards finding a sustainable solution. [ ] [ ]

Frequently Asked Questions

The word "key" in English means: A metal object used to open or close a lock., Something that provides a solution or access to understanding something., A set of notes in music based on a particular note..

The phonetic transcription of "key" is /kiː/ in British English and /kiː/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "key": solution, important, essential, answer, critical, explanation.

Example usage of "key": "I lost my key this morning, so I can't open the door.". More examples on the page.