occurrence, event, incident, episode, circumstance mean something that happens or takes place. occurrence may apply to a happening without intent, volition, or plan. an encounter that was a chance occurrence event usually implies an occurrence of some importance and frequently one having antecedent cause.

Event definition: something that happens or is regarded as happening; an occurrence, especially one of some importance..

An event can be described as a public assembly for the purpose of celebration, education, marketing or reunion. Events can be classified on the basis of their size, type and context.