\begin{definition}[Definition:Nowhere Dense/Definition 2]
Let $T = \struct {S, \tau}$ be a topological space.
Let $H \subseteq S$.
$H$ is '''nowhere dense''' in $T$ {{iff}}:
:$H^-$ contains no open set of $T$ which is non-empty
where $H^-$ denotes the closure of $H$.
\end{definition}