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KEY meaning: 1. a piece of metal that has been cut into a special shape and is used for opening or closing a…. Learn more.

Each key has its own scale, beginning and ending on the note that defines the octave of the next scale. The key of C-major uses a scale that starts on C and uses only the white keys of the piano.

Of crucial importance; significant: key decisions; the key element of the thesis.

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The meaning of KEY is a usually metal instrument that is used to open a lock or to start or access a mechanism. How to use key in a sentence.

The usual type of key is a small metal object that you insert into a narrow opening and turn.

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