know-how know-how {n.}, {slang} Expertise; ability to devise and construct. The United States had the know-how to beat the Soviet Union to the moon in 1969. Categories: add yours {n.} {slang} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 » In RussianTo section: K Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry