adj. 25B6; adjective
stale food : OLD, past its best, past its sell-by date; off, dry, hard, musty, rancid.
stale air : STUFFY, close, musty, fusty, stagnant, frowzy; Brit. frowsty, fuggy.
stale beer : FLAT, turned, spoiled, off, insipid, tasteless.
stale jokes : HACKNEYED, tired, worn out, overworked, threadbare, warmed-up, banal, trite, clichéd, platitudinous, unoriginal, unimaginative, uninspired, flat; out of date, outdated, outmoded, passé, archaic, obsolete; N. Amer. warmed-over; informal old hat, corny, out of the ark, played out.
fresh, original.