1. (a.) Capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound.

2. (a.) Aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies.

3. (a.) Subject to death; mortal.

4. (adv.) In a manner resembling, or as if produced by, death.

5. (adv.) In a manner to occasion death; mortally.

6. (adv.) In an implacable manner; destructively.

7. (adv.) Extremely.