adjective \ˈhärm-fəl\

: causing or capable of causing damage or harm

Full Definition of HARMFUL

:  of a kind likely to be damaging :  injurious
harm·ful·ly \-fə-lē\ adverb
harm·ful·ness noun

Examples of HARMFUL

  1. <DDT has been proven to be extremely harmful to the environment.>

First Known Use of HARMFUL

14th century


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