noun
A key signature is a group of sharps or flats placed at the beginning of a piece of music to indicate the key or tonality.
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The key signature indicates the key of a musical piece by specifying which notes are sharp or flat.
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Remember to check the key signature before playing a new song on the piano.
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I always struggle with remembering the key signature for each piece I play.
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In life, the key signature to success is hard work and determination.