In the first sense, the term event is used in physics, theories about physics, and in theories that attempt to introduce a more general kind of entity to generalize about than facts. A linguistic parallel here is that facts are expressed by statements, whereas events are expressed by terms.

In the second sense, the term event is especially used in probability theory and statistics, where it is used to refer to possible outcomes in what then is often called the space of events. Thus, one may speak of the event of drawing the ace of spades from a pack of cards.