Event - Simple English Wikipedia, the free encyclopedia

# Event

### From Simple English Wikipedia, the free encyclopedia

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Simple English Wiktionary has a dictionary definition (word meaning) for:
event

An event is something that takes place. It also refers to an important happening or activity.

Different events are important for different people. People think about their lives like they are made up of different pieces, and they separate the pieces by events they think are important.

## [edit] Culture

- A special occasion, such as a wedding or other party, is a social event.

## [edit] Science

- In physics (and in some kinds of philosophy), an event occurs at a point in time which can be distinguished because the state of the world changed. Something was different before and after the event.
- In special relativity (and general relativity), an event is a point in the spacetime continuum, i.e. it has a position in space and time.
- In experimental particle physics, an event refers to a set of elementary particle interactions recorded in a brief span of time.
- In probability a possible outcome of an experiment is called an elementary event, while a set of those (a subset of all) is called simply an event. (See event (probability theory).)
- In biology one speaks of extinction events.
- In philosophy, one might want to distinguish facts from events, and then between physical events, mental events, and brain events.
- Weinberg's Law of Twins states that most of the time, no matter how much effort one expends, no event of any great significance will result.

## [edit] Telecommunications

- In information processing, an event is a change in the properties received by an observer after being transmitted from an object.
- In computer science, an event is a software message that indicates something has happened. See event-driven programming. A number of protocols, such as MIDI, are also event-based.

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Categories: Complex pages | Disambiguation | Time

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