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 from…. Learn more. Definition of prevent verb in oxford advanced learner's dictionary.

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