Definition:Elementary Event

Definition

Let $\mathcal E$ be an experiment.

An elementary event of $\mathcal E$, often denoted $\omega$ (Greek lowercase omega) is one of the elements of the sample space $\Omega$ (Greek capital omega) of $\mathcal E$.

Outcome

An elementary event is one of the possible outcomes of $\mathcal E$.

Thus an outcome means the same thing as elementary event.

Sources

• Geoffrey Grimmett: Probability: An Introduction (1986): $\S 1.2$