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.

Middle English, from dead + -ly.

deadly serious:

Extremely serious, not to be taken lightly.

to be deadly tired:

To be extremely tired.

Extremely good or impressive.

That concert was deadly!

Intensely dangerous or risky.

This new stunt is gonna be deadly if we mess it up.