prelude

Noun
  1. Something that serves as a preceding event or introduces what follows (synset 107341613)
    "training is a necessary preliminary to employment"; "drinks were the overture to dinner"
  2. Music that precedes a fugue or introduces an act in an opera (synset 107054289)
Verb
  1. Serve as a prelude or opening to (synset 202677287)
  2. Play as a prelude (synset 201729492)

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