A1noun1K

Key

UK /["/kiː/"]/US /["/kiː/"]/

Definition

a piece of metal with a special shape used for locking a door, starting a car, etc.

In simple words: A small metal thing that you use to open a lock.

Examples

  • I lost the key to my house last night.
  • She played the piano as the key changed from C to G.
  • Make sure to use the right key to start the car.
  • The key to success is hard work and determination.
  • He gave me the key to the city as an honor.

Usage notes

Use 'key' when talking about unlocking doors or starting cars. Avoid using it in overly formal contexts unless referring to 'key concepts' or 'key players'.

Grammar pattern

key + object (e.g. 'key the door')

Memory hint

Think of a 'key' as the 'key' to opening doors in life.

Collocations

  • master
  • skeleton
  • duplicate
  • bunch
  • ring
  • set
  • turn
  • insert
  • put in
  • open
  • unlock
  • lock
  • with a/​the key
  • key for
  • key to
  • get a key cut
  • have
  • hold
  • key to
  • Alt
  • arrow
  • backspace
  • row
  • hit
  • hold down
  • press
  • organ
  • piano
  • etc.
  • caress
  • stroke
  • touch
  • major
  • minor
  • high
  • change
  • change
  • change
  • signature
  • in a/​the key
  • key of
  • a change of key

Synonyms

  • secret

Antonyms

  • lock

Common mistakes

  • Confused with 'cue' when talking about hints.
  • Using 'key' as a verb incorrectly.
  • Forgetting to specify the type of key (e.g. car key, house key).