If a situation or event happens to someone or something, it has an effect on that person or thing: 1. to take place; come to pass; occur. to come to pass by chance; occur without apparent reason or design. Definition of happen in the Definitions.net dictionary. What does happen mean? Information and translations of happen in the most comprehensive dictionary definitions resource on … Happen, chance, occur refer to the taking place of an event. 6 days ago · The meaning of HAPPEN is to occur by chance —often used with it. How to use happen in a sentence. What is a basic definition of happen? Happen means to occur, to come to pass by chance, or to befall someone or something. Happen has several other senses as a verb. Happen is a very general word that … as it happens/happened used when you say something that is surprising, or something connected with what somebody else has just said I agree with you, as it happens. As it happens, I have a spare set of ….