The key
Example: She played the key of C major on the piano.
Definition
"The key" in music refers to the group of pitches, or scale, that forms the basis of a musical composition. It determines the harmonic framework and tonal center, such as the key of C major, which guides the melody and harmony throughout the piece.
Etymology
The term "the key" in music originates from the metaphorical idea of a 'key' as something that unlocks or opens. Just as a physical key opens a door, the musical key 'unlocks' a set of notes that shape a piece's tonal structure. Its use dates back to the development of tonal music in the Baroque period.
Learn to use this word actively
"The key" appears in the Vocaplus list "English - Music - (A2) - set 1", containing 102 commonly used words.
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