Examples of harmful in a Sentence
DDT has been proven to be extremely harmful to the environment.
First Known Use of harmful
HARMFUL Defined for English Language Learners
Definition of harmful for English Language Learners
: causing or capable of causing damage or harm
HARMFUL Defined for Kids
Legal Definition of harmful
: of a kind likely to cause harm
Seen and Heard
What made you want to look up harmful? Please tell us where you read or heard it (including the quote, if possible).