1. (verb)err, mistake, slip to make a mistake or be incorrect Synonyms: slide, steal, misidentify, sneak, slew, stray, slue, skid, slip one's mind, drop away, drift, slip, dislocate, splay, luxate, drop off, fall away, mistake, err
2. (verb)stray, err, drift wander from a direct course or at random Synonyms: ramble, rove, range, stray, divagate, err, cast, roam, be adrift, swan, roll, digress, drift, wander, slip, freewheel, blow, tramp, mistake, vagabond, float
Synonyms, Thesaurus & Antonyms of 'err'
English Synonyms and Antonyms
1. err To wander (AS. windan, wind) is to move in an indefinite or indeterminate way which may or may not be a departure from a prescribed way; to deviate (L. de, from, and via, a way) is to turn Synonyms: wander, deviate, diverge, go astray, range, rove, swerve, digress, err, ramble, roam, stray, veer
Synonyms for err 
