the male of the sheep and allied animals. in some parts of england a ram is called a tup.-aries, the sign of the zodiac which the sun enters about the 21st of march.-the constellation aries, which does not now, as formerly, occupy the sign of the same name.-an engine of war used for butting or battering.-in ancient warfare, a long beam suspended by slings in a framework, and used for battering the walls of cities; a battering-ram.-a heavy steel or iron beak attached to the prow of a steam war vessel for piercing or cutting down the vessel of an enemy; also, a vessel carrying such a beak.-a hydraulic ram. see under hydraulic.-the weight which strikes the blow, in a pile driver, steam hammer, stamp mill, or the like.-the plunger of a hydraulic press.-to butt or strike against; to drive a ram against or through; to thrust or drive with violence; to force in; to drive together; to cram; as, to ram an enemy's vessel; to ram piles, cartridges, etc.-to fill or compact by pounding or driving.