Dictionary
harmful
adjective harm·ful \ˈhärm-fəl\
: causing or capable of causing damage or harm
Full Definition of HARMFUL
See harmful defined for English-language learners
See harmful defined for kids
ADVERTISEMENT
First Known Use of HARMFUL
14th century
Related to HARMFUL
- Synonyms
- adverse, bad, baleful, baneful, damaging, dangerous, deleterious, detrimental, evil, hurtful, ill, injurious, mischievous, nocuous, noxious, pernicious, prejudicial, wicked
HARMFUL Defined for Kids
harmful
adjective harm·ful \ˈhärm-fəl\
Definition of HARMFUL for Kids
: causing or capable of causing harm : injurious <Keep harmful substances away from children.>
— harm·ful·ly \-fə-lē\ adverb
Learn More About HARMFUL
Browse
ADVERTISEMENT
Seen & Heard
What made you want to look up harmful? Please tell us where you read or heard it (including the quote, if possible).