occurrence Definition

occur
verb, intr occurred, occurring

1. To happen or take place.

Thesaurus: happen, take place, transpire, come about, arise, come to pass, develop, crop up, befall, manifest itself, materialize.
intr
2. To be found or exist.

Derivative: occurrence

Anything that occurs; an event, especially an unexpected one.
Thesaurus: event, incident, happening, episode, development, instance, occasion, case.

The act or fact of occurring.
Thesaurus: manifestation, appearance.

Derivative: occurrent
adj

Etymology: 15c: from Latin occurrere to run towards, to befall.

Phrasal Verb: occur to someone

To come into their mind, especially unexpectedly or by chance.
Example: It occurred to her that the train might be late