key

/kiː/
noun
  1. A small piece of metal used to open or lock a door, drawer, or container.
    • The janitor has a key to every classroom.
    • She turned the key in the lock and opened the door.
    • I can't find my house key anywhere.
  2. A button on a keyboard or keypad that is pressed to operate a device.
    • Press the Enter key to submit the form.
    • The space key is the longest key on the keyboard.
    • He tapped the wrong key and deleted his work.
  3. A set of related notes in music, based on a particular scale.
    • The pianist played a beautiful melody in a minor key.
    • This song is written in the key of C major.
    • She changed the key to make it easier to sing.
  4. Something that provides a solution or explanation; a crucial element.
    • Hard work is the key to success.
    • Patience is the key when learning a new language.
    • The detective found the key to the mystery.
  5. A small island or low reef, especially in the Caribbean.
    • Palm trees lined the shore of the sandy key.
    • The Florida Keys are a popular vacation destination.
    • We took a boat trip to a small key off the coast.
verb
  1. To enter or adjust data using a keyboard or keypad.
    • She keyed the numbers into the calculator.
    • Please key your password into the system.
    • He keyed the customer's information into the database.
  2. To make something suitable or coordinated with something else.
    • The exercises are keyed to different fitness levels.
    • The training program is keyed to the needs of beginners.
    • The colors of the curtains are keyed to the wallpaper.
Synonyms
adjective
  1. Of crucial importance; essential.
    • The key question is whether we have enough time.
    • She played a key role in the project's success.
    • Communication is a key skill in any job.
Antonyms
What does "key" mean? | whatsthatwordmean | whatsthatwordmean