To keep from occurring; See examples of prevent used in a sentence. To prevent is to stop something effectually by forestalling action and rendering it impossible:

To hamper is to clog or entangle or put an embarrassing restraint upon: Definition of prevent. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels. To stop something from happening or someone from doing something: To stop something fromÒ€¦. Learn more. Definition of prevent verb in oxford advanced learner's dictionary.

To stop something fromÒ€¦. Learn more. Definition of prevent verb in oxford advanced learner's dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.