VoronoiMesh
VoronoiMesh[{p1, ..., pn}] gives a MeshRegion representing the Voronoi mesh from the points p1, p2, ....
VoronoiMesh[{p1, ..., pn}, {{xmin, xmax}, ...}]clips the mesh to the bounds [xmin, xmax]×....
Examples
Create a Voronoi mesh from random points:
VoronoiMesh[RandomReal[1, {10, 2}]]Clip the mesh to a specific region:
VoronoiMesh[RandomReal[1, {20, 2}], {{0, 1}, {0, 1}}]Please visit the official Wolfram Language Reference for more details.