Topic: MUSIC
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var‧i‧a‧tion W2

1 [uncountable and countable] a difference between similar things, or a change from the usual amount or form of something
2 [countable] something that is done in a way that is different from the way it is usually done :
3 [countable]APM one of a set of short pieces of music, each based on the same simple tune :
Bach's Goldberg variations
Bach's Goldberg variations