Prime2  v. (-ming) 1 prepare (a thing) for use or action. 2 prepare (a gun) for firing or (an explosive) for detonation. 3 pour (liquid) into a pump to enable it to work. 4 prepare (wood etc.) For painting by applying a substance that prevents paint from being absorbed. 5 equip (a person) with information etc. 6 ply (a person) with food or drink in preparation for something. [origin unknown]