Harmful definition

härmfəl
Causing or able to cause harm; hurtful.
adjective
36
10
Causing or capable of causing harm; injurious.
adjective
26
11
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
6
0
Of a kind likely to be damaging; injurious.

Wear a hat to protect your skin from harmful sunlight.

adjective
4
0
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Origin of harmful

  • From harm +‎ -ful.

    From Wiktionary