Causing or capable of causing death. adjective
The venom of the snake is deadly to humans.
He was found guilty of using a deadly weapon during the robbery.
Extremely accurate or effective. adjective
Her aim with the bow and arrow was deadly.
The striker's deadly precision in front of the goal made him a top scorer.
Very intense or extreme. adjective
There was a deadly silence after the announcement.
The competition was deadly serious, with no room for error.
In a way that is likely to cause death. adverb
The poison acts deadly when ingested.
The virus spread deadly throughout the community.