Definitions For Key

noun

• 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 (as in a keyboard) 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
• Something crucial for explaining
• A generic term for any device whose possession entitles the holder to a means of access
• A list of words or phrases that explain symbols or abbreviations
• A list of answers to a test
• 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
• 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
• To enter (information) by using the keys of a computer, typewriter, etc.
• To have the most important part in (something)

verb

• Harmonize with or adjust to
• Regulate the musical pitch of
• Identify as in botany or biology, for example
• Vandalize a car by scratching the sides with a key
• Provide with a key
• Extremely important

adjective

• Serving as an essential component