sit down . sit down {v.} To sit on a seat or resting place. After gym class Jim was tired and was glad to sit down and rest. Categories: add yours {v.} 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 Add my comment