• (by extension) Very accurate (of aiming with a bow, firearm, etc.).
  • Aiming or willing to destroy; implacable; desperately hostile.

    "deadly enemies"

  • (informal) Excellent, awesome, cool.
  • Causing death; lethal.
  • (informal) Very boring.
  • (obsolete) Subject to death; mortal.


  • (obsolete) Fatally, mortally.
  • Extremely.

    "deadly weary — deadly cunning a man — Arbuthnot."

  • In a way which suggests death.

    "Her face suddenly became deadly white."

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