Cleave/kliːv/ Definition 1 of 3Pro Tip 1/3Physical Action Cleave as a verb usually describes a forceful, physical splitting action. He used a sword to cleave the shield in half. Pro Tip 2/3Natural Line When cleaving, the split often follows a natural or existing line or grain, like with wood or meat. The butcher cleaved along the joint of the meat. Pro Tip 3/3Not Peaceful Cleaving something can be violent or require great effort, not gentle or peaceful. During the rescue, firefighters had to cleave the door apart.