\begin{definition}[Definition:Probability Measure/Definition 2]
Let $\EE$ be an experiment.
Let $\Omega$ be the sample space on $\EE$.
Let $\Sigma$ be the event space of $\EE$.
A '''probability measure on $\EE$''' is a mapping $\Pr: \Sigma \to \R$ which fulfils the Kolmogorov axioms:
{{:Axiom:Kolmogorov Axioms}}
\end{definition}