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- Dictionaryharmful/ˈhɑːmf(ʊ)l/
adjective
- 1. causing or likely to cause harm: "the ozone layer blocks the harmful rays from the sun"
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adjective. uk / ˈhɑːm.f ə l / us / ˈhɑːrm.f ə l / Add to word list. B2. causing harm: harmful to This group of chemicals is known to be harmful to people with asthma. Synonyms. damaging. deleterious formal. detrimental formal. injurious formal. prejudicial formal. Opposites. harmless. innocuous. Compare. hurtful.
The meaning of HARMFUL is of a kind likely to be damaging : injurious. How to use harmful in a sentence.
Harmful definition: causing or capable of causing harm; injurious. See examples of HARMFUL used in a sentence.
Harmful is an adjective that comes in handy when you're talking about things that cause injury to someone or damage something. Burning coal can be harmful to the environment, and eating too much candy can be harmful for your teeth.
It's important to protect your skin from the harmful effects of the sun. Prolonged use of the drug is known to have harmful side-effects. The program makers disagree that seeing violence on television has a harmful effect on children. Food must be heated to a high temperature to kill harmful bacteria.
Define harmful. harmful synonyms, harmful pronunciation, harmful translation, English dictionary definition of harmful. adj. Causing or capable of causing harm; injurious. harm′ful·ly adv. harm′ful·ness n.
Something that is harmful has a bad effect on something else, especially on a person's health. ...the harmful effects of smoking. It believed the affair was potentially harmful to British aviation.
