set fire to . set fire to {v. phr.} To cause to burn; start a fire in. The sparks set fire to the oily rags. Compare: CATCH FIRE. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: S Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Post my comment