deadline deadline {n.} A final date by which a project, such as a term paper, is due. The deadline for the papers on Shakespeare is November 10. Categories: add yours {n.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2025 To section: D Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Comment on this entry