Home › Words › P › pseudomanifoldpseudomanifoldpseudomanifold · noun — A special type of topological space that looks like a manifold at most of its points, but may contain singularities.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom pseudo- + manifold.nounA special type of topological space that looks like a manifold at most of its points, but may contain singularities.Definitions & examples from Wiktionary (CC BY-SA 3.0).