1. A rich, thick, Spanish stew consisting of meat and vegetables.
  2. A mixture or medley, a hotchpotch.
  3. A collection of various musical, theatrical or other artistic works; a miscellany.
  4. By extension of the above, Vaudeville or similar miscellaneous musical or theatrical entertainment skits presented between the main acts of minstrel or burlesque shows.

The above text is a snippet from Wiktionary: olio
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