Definition of prevent
- steps to prevent war
Seatbelts in cars often prevent serious injuries.
Can exercise and a healthy diet prevent heart disease?
The accident could have been prevented.
He grabbed my arm to prevent me from falling.
Bad weather prevented us from leaving.
How are you going to prevent him from finding out about the party?
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prevent.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: to stop (something) from happening or existing
: to make (someone or something) not do something : to stop (someone or something) from doing something
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