From Middle English erren, from Old French errer (“to wander, err, mistake”), from Latin errō (“wander, stray, err, mistake”, verb), from Proto-Indo-European *ares- (“to be angry, lose one's temper”). Cognate with Old English eorre, ierre (“anger, wrath, ire”), Old English iersian (“to be angry with, rage, irritate, provoke”), Old English ierre (“wandering, gone astray, confused”)
- (intransitive) To make a mistake.
- He erred in his calculations, and made many mistakes.
- (intransitive) To sin.
- (archaic) to stray.
- See also Wikisaurus:make a mistake
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err n (genitive singular errs, nominative plural err)