Definition for harmful
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Example Sentences

These invisible fragments may be toxic on their own, and they also have the potential to harbor a layer of harmful microbes or chemicals.

That said, scientists haven’t fully nailed down how harmful subway particles may be to human health.

It’s not harmful in small amounts, but higher concentrations become dangerous.

The work of organizers over the past eight months continues a long tradition of confronting unnecessary and harmful investments in institutions like the police.

It’s also a place where people spread harmful misinformation—a problem that has proliferated on the platforms of its more mature rivals.

From Fortune

Not long ago, the concept of diversity was viewed as anti-meritocratic—even harmful.

Others fear that giving them the force of regulation could be more harmful because they would become outdated quickly.

So why are we continually inundated with images and hate speech perpetuating this harmful lie?

It will likely be harmful to the reputations of both the president and vice president.

Another act, however, may be considered immoral not because it is harmful but because it evinces disloyalty.

This line is not in the F. text; it seems to mean—'a wave, harmful in wearing away the shore.'

There is one great point in our favour, these people can do nothing very harmful so long as those papers are missing.

In addition, this advertising may be harmful to those juveniles and adolescents with whom this Committee is primarily concerned.

It involves a continual struggle against harmful influences from outside.

Tell me,” said Hadria, “what are the qualities in a human being that make him most serviceable, or least harmful?


On this page you'll find 109 synonyms, antonyms, and words related to harmful, such as: adverse, bad, catastrophic, damaging, destructive, and detrimental.

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.