<p><strong>Noun:</strong></p><ul><li>Mathematics.<ul><li>plural topologies.<ul><li>the study of those properties of geometric forms that remain invariant under certain transformations, as bending or stretching.</li><li>Also called point set topology.</li><li>the study of limits in sets considered as collections of points.</li><li>a collection of open sets making a given set a topological space.</li></ul></li></ul></li></ul>