Harmful definitions

härm'fəl
Causing or capable of causing harm; injurious.
adjective
14
2
The definition of harmful is something that causes damage or is able to be hurtful.

A chemical that causes you to become sick is an example of a chemical that would be described as harmful.

adjective
13
1
Causing or able to cause harm; hurtful.
adjective
12
1
Of a kind likely to be damaging; injurious.

Wear a hat to protect your skin from harmful sunlight.

adjective
5
3

Origin of harmful

From harm +‎ -ful.