Err Definition

ĕr, ûr

erred, errs

verb

erred, errs

To be wrong or mistaken; fall into error.

Webster's New World

To deviate from the established moral code; do wrong.

Webster's New World

To go astray; wander.

Webster's New World

To stray.

American Heritage

To err is defined as to make a mistake or to do something wrong.

When you add 2+2 and get 5, this is an example of a situation where you err.

YourDictionary

Synonyms:

Antonyms:

noun

(law) Abbreviation of errors.

Wiktionary

Origin of Err

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”).

From Wiktionary
Middle English erren from Old French errer from Latin errāre to wander ers- in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition