on a dime . on a dime {adv. phr.}, {informal} In a very small space. Bob can turn that car on a dime. Tom says his new sports car will stop on a dime. Categories: add yours {adv. phr.} {informal} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: O Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Discuss