Key

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Key Meaning and Definition in Dictionary

Definitions from Wordnet 2.0


  • metal device shaped in such a way that when it is inserted into the appropriate lock the lock''s mechanism can be rotated
  • a lever that actuates a mechanism when depressed
  • the central building block at the top of an arch or vault
  • mechanical device used to wind another device that is driven by a spring (as a clock)
  • pitch of the voice; "he spoke in a low key"
  • something crucial for explaining; "the key to development is economic integration"
  • a generic term for any device whose possession entitles the holder to a means of access; "a safe-deposit box usually requires two keys to open it"
  • a list of words or phrases that explain symbols or abbreviations
  • a list of answers to a test; "some students had stolen the key to the final exam"
  • any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music
  • (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court; "he hit a jump shot from the top of the key"; "he dominates play in the paint"
  • a coral reef off the southern coast of Florida
  • United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner'' (1779-1843)
  • a winged often one-seed indehiscent fruit as of the ash or elm or maple
  • a kilogram of a narcotic drug; "they were carrying two keys of heroin"
  • harmonize with or adjust to; "key one''s actions to the voters'' prevailing attitude"
  • regulate the musical pitch of
  • identify as in botany or biology, for example
  • vandalize a car by scratching the sides with a key; "His new Mercedes was keyed last night in the parking lot"
  • provide with a key; "We were keyed after the locks were changed in the building"
  • serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"
  • effective; producing a desired effect; "the operative word"

Definitions from Wiktionary


  • metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated ,
  • something crucial for explaining; "the key to development is economic integration" ,
  • pitch of the voice; "he spoke in a low key" ,
  • any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music ,
  • a kilogram of a narcotic drug; "they were carrying two keys of heroin" ,
  • a winged often one-seed indehiscent fruit as of the ash or elm or maple ,
  • United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843) ,
  • a coral reef off the southern coast of Florida ,
  • (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court; "he hit a jump shot from the top of the key"; "he dominates play in the paint" , 10. a list of answers to a test; "some students had stolen the key to the final exam" , 1
  • a list of words or phrases that explain symbols or abbreviations , 1
  • a generic term for any device whose possession entitles the holder to a means of access; "a safe-deposit box usually requires two keys to open it" , 1
  • mechanical device used to wind another device that is driven by a spring (as a clock) , 1
  • the central building block at the top of an arch or vault , 1
  • a lever that actuates a mechanism when depressed

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Key Meaning and Definition in Wikipedia


A key is an object used to open and close locks. Many things have locks, for example, doors. Keys are also used to turn on cars, machines and other things.

A key is used by placing the key into the slot of the thing you want to unlock.

A key that can open more than one lock (if each lock also has its own key) is called a master key or skeleton key.

The key was likely invented by Theodore of Samos in 6th Century BC.



Words and phrases related to 'Key'


Meaning of the Name 'Key'


  • Meaning: Son of Aidan
  • Origin: Gaelic
  • Gender: Male


'Key' example sentence in quotations


* Above all, I would teach him to tell the truth ... Truth-telling, I have found, is the key to responsible citizenship. The thousands of criminals I have seen in 40 years of law enforcement have had one thing in common Every single one was a liar. - J. Edgar Hoover

* As death, when we come to consider it closely, is the true goal of our existence, I have formed during the last few years such close relations with this best and truest friend of mankind, that his image is not only no longer terrifying to me, but is indeed very soothing and consoling And I thank my God for graciously granting me the opportunity...of learning that death is the key which unlocks the door to our true happiness. - Thomas Mann

* Jean Grey Mutation. It is the key to our evolution. It has enabled us to evolve from a single-celled organism into the dominant species on the planet. This process is slow and normally taking thousands and thousands of years. But every few hundred millennia, evolution leaps forward. - X2 X-Men United


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Key Sample Sentences in News



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