Let $M = (X, \mathcal{F})$ be a D1108: Measurable space such that

(i)	\begin{equation} X \neq \emptyset \end{equation}
(ii)	$x \in X$ is a D2218: Set element in $X$

The point measure on $M$ with respect to $x$ is the D4361: Unsigned basic function \begin{equation} \mathcal{F} \to [0, \infty], \quad E \mapsto \left| E \cap \{ x \} \right| \end{equation}