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adj. stal·er, stal·est
1. Having lost freshness, effervescence, or palatability: stale bread; stale air.
2. Lacking originality or spontaneity: a stale joke.
3. Ineffective or uninspired, usually from being out of practice or from having done the same thing for too long.
4. Law Legally unenforceable because of a claimant's delay in seeking enforcement.
tr. & intr.v. staled, stal·ing, stales
To make or become stale.
[Middle English, settled, clear (used of beer or wine), probably from Old French estale, slack, settled, clear, from estaler, to come to a standstill, halt, from estal, standing place, stand, of Germanic origin; see stel- in Indo-European roots.]
intr.v. staled, stal·ing, stales
To urinate. Used especially of horses and camels.
The urine of certain animals, especially horses and camels.
[Middle English stalen, possibly of Low German origin; akin to Middle Low German stallen.]