Mortal; liable to death; being in danger of death.Occasioning or capable of causing death, physical or spiritual; mortal; fatal; destructive: as, a deadly blow or wound.Mortal; implacable; aiming or tending to kill or destroy: as, a deadly enemy; deadly malice; a deadly feud.Adapted for producing death or great bodily injury: as, a deadly weapon; a deadly drug.Dead.Very great; excessive.Mortally.Implacably; destructively.In a manner resembling death; deathly: as, deadly pale or wan.Extremely; excessively.