Definition Of deadly
causing or able to cause death.
a deadly weapon
in a way resembling or suggesting death; as if dead.
her skin was deadly pale
Example Of deadly
"You killed her, " Amy said her voice deadly and unforgiving.
After a moment of deadly silence, the general spoke.
Agent Orange contained dioxins, which are some of the most deadly poisons known.
And because I came from a single-income family, I was eligible for a student allowance, even with the deadly radar of means-testing.
And in doing so there's a distinct possibility that deadly force will have to be used.