burst into flames . burst into flames {v. phr.} To begin to burn suddenly. The children threw away some burning matches and the barn burst into flames. Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment