To err, to go astray, to wander, to sin unintentionally
Brown-Driver-Briggs Hebrew Lexicon
1) to go astray, stray, err 1a)(Qal) 1a1) to err, stray 1a2) to swerve, meander, reel, roll, be intoxicated, err (in drunkenness) 1a3) to go astray (morally) 1a4) to commit sin of ignorance or inadvertence, err (ignorantly) 1b) (Hiphil) 1b1) to lead astray 1b2) to lead astray, mislead (mentally) 1b3) to lead astray (morally)