\begin{definition}[Definition:Geometric Figure]
A '''geometric figure''' is intuitively defined as a set of points and lines in space.
{{EuclidSaid}}
:''{{:Definition:Euclid's Definitions - Book I/14 - Geometric Figure}}''
{{EuclidDefRefNocat|I|14|Geometric Figure}}
The boundary may or may not be included in a particular figure. If this is important (and in the study of topology it usually is), then whether it is included or not needs to be specified.
\end{definition}