Definitions
1.adjective(alcohol) Clear, free of dregs and lees; old and strong.
2.adjectiveNo longer fresh, in reference to food, urine, straw, wounds, etc.
3.adjectiveNo longer fresh, new, or interesting, in reference to ideas and immaterial things; cliche, hackneyed, dated.
4.adjectiveNo longer nubile or suitable for marriage, in reference to people; past one's prime.
5.adjectiveFallow, in reference to land.
6.adjectiveUnreasonably long in coming, in reference to claims and actions."a stale affidavit"
7.adjectiveTaking a long time to change
8.adjectiveWorn out, particularly due to age or over-exertion, in reference to athletes and animals in competition.
9.adjectiveOut of date, unpaid for an unreasonable amount of time, particularly in reference to checks.
10.adjectiveOf data: out of date; not synchronized with the newest copy."The bug was found to be caused by stale data in the cache."