Deadly

/ˈdɛdli/

Meaning & Definition

adjective
Causing or able to cause death; fatal.
The deadly virus spread rapidly through the population.
Extremely harmful or destructive; lethal.
The team's strategy was considered deadly effective in achieving their goals.
Intensely dangerous or serious.
He took a deadly risk by climbing without safety gear.
adverb
In a manner that causes death or serious harm.
The poison was delivered deadly and efficiently.

Etymology

Middle English, from dead + -ly.

Common Phrases and Expressions

deadly serious
Extremely serious, not to be taken lightly.
to be deadly tired
To be extremely tired.

Related Words

death
The end of life.
mortality
The state of being subject to death.
fatality
An occurrence of death.

Slang Meanings

Extremely good or impressive.
That concert was deadly!
Intensely dangerous or risky.
This new stunt is gonna be deadly if we mess it up.