1. keep (something) from happening or arising: "action must be taken to prevent further accidents"
▪ make (someone or something) unable to do something: "window locks won't prevent a determined burglar from getting in"
2. (of God) go before (someone) with spiritual guidance and help.archaic
Word Originlate Middle English (in the sense ‘act in anticipation of’): from Latin praevent- ‘preceded, hindered’, from the verb praevenire, from prae ‘before’ + venire ‘come’.