Definitions
1.NounAn opening; a recess or chamber. .mw-parser-output .defdate{font-size:smaller}
2.NounDisclosure; discovery; revelation.
3.NounAn approach or proposal made to initiate communication, establish a relationship etc."overture of friendship"
4.NounA motion placed before a legislative body, such as the General Assembly of the Church of Scotland.
5.NounA musical introduction to a longer piece of music or a dramatic work (such as a play, an opera, or a motion picture).
6.NounA medley of themes from a larger work, such as an opera or musical, typically played at the beginning but sometimes played at any part of the work or performed as a standalone piece.
7.VerbTo make overtures; to approach with a proposal.
8.AdjectiveOvert, that is, disclosed.