adj subject to death; mortal.
2. deadly ·adv extremely.
3. deadly ·adv in an implacable manner; destructively.
4. deadly ·adv in a manner to occasion death; mortally.
5. deadly ·adv in a manner resembling, or as if produced by, death.
6. deadly ·adj aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies.
7. deadly ·adj capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound.