"Brother of anger = irascible. (1.) The father Ahinoam, the wife" of Saul (1 Sam. 14:50). "(2.) The son and successor of Zadok in the office of high priest "(1 Chr. 6:8, 53). On the occasion of the revolt of Absalom he" "remained faithful to David, and was of service to him in" conveying to him tidings of the proceedings of Absalom in "Jerusalem (2 Sam. 15:24-37; 17:15-21). He was swift of foot, and" was the first to carry to David tidings of the defeat of "Absalom, although he refrained, from delicacy of feeling, from" telling him of his death (2 Sam. 18:19-33).

See where Ahimaaz occurs in the Bible...

Definition of Ahimaaz:
"a brother of the council"