Amasa (ăm'a-sah), burden. 1. A kinsman of David, and chief captain in Absalom's rebel army. David pardoned Amasa, but he was assassinated by Joab. 2 Samuel 17:25, 2 Samuel 19:13, 2 Samuel 1:20-10, 1 Chronicles 2:17.. A descendant of Ephraim. 2 Chronicles 1:28-27 :