Definitions
1.adjectiveSubject to death; mortal.
2.adjectiveCausing death; lethal.
3.adjectiveAiming or willing to destroy; implacable; desperately hostile."deadly enemies"
4.adjectiveVery accurate (of aiming with a bow, firearm, etc.).
5.adjectiveVery boring.
6.adjectiveExcellent, awesome, cool.
7.adverbFatally, mortally.
8.adverbIn a way which suggests death."Her face suddenly became deadly white."
9.adverbExtremely.