<p><strong>Adjective</strong></p><ul><li>Not fresh; vapid or flat, as beverages; dry or hardened, as bread.</li><li>Synonyms: insipid, sour, tasteless, hard.</li><li>Antonyms: fresh.</li><li>Musty; stagnant: stale air.</li><li>Having lost novelty or interest; hackneyed; trite: a stale joke.</li><li>Synonyms: uninteresting, common, old, stereotyped.</li><li>Having lost freshness, vigor, quick intelligence, initiative, or the like, as from overstrain, boredom, or surfeit: He had grown stale on the job and needed a long vacation.</li><li>Law: Having lost force or effectiveness through absence of action, as a claim.</li></ul><p><strong>Verb</strong></p><ul><li>(used with or without object)<ul><li>To make or become stale.</li></ul></li></ul>