Definition:Interior


 * Topology and metric spaces:
 * The interior of a subset $H$ of a topological space: The largest open set contained in $H$.
 * The interior of a subset $H$ of the complex plane $\C$: The set of all interior points of $H$


 * Plane Geometry:
 * Interior of a Region
 * Interior of an Angle

Also see

 * Definition:Exterior