## Definition of topology

**:**topographic study of a particular place; specifically

**:**the history of a region as indicated by its topography

**:**a branch of mathematics concerned with those properties of geometric configurations (such as point sets) which are unaltered by elastic deformations (such as a stretching or a twisting) that are homeomorphisms

**:**the set of all open subsets of a topological space

**:**configuration

- topology of a molecule

- topology of a magnetic field