topology

noun7

1. •
   The anatomical structure of part of the body.
2. •
   The arrangement of nodes in a communications network.
3. •
   The branch of mathematics dealing with those properties of a geometrical object (of arbitrary dimensionality) that are unchanged by continuous deformations (such as stretching, bending, etc., without tearing or gluing).

   • This book is designed to develop the fundamental concepts of general topology which are the basic tools of working mathematicians in a variety of fields. — 1970
4. •
   Any collection τ of subsets of a given set X that contains both the empty set and X, and which is closed under finitary intersections and arbitrary unions.

   • The subsets of a set X which constitute a topology are called the open sets of X.
5. •
   The properties of a particular technological embodiment that are not affected by differences in the physical layout or form of its application.
6. •
   The topographical study of geographic locations or given places in relation to their history.
7. •
   (old-fashioned) The art of, or method for, assisting the memory by associating the thing or subject to be remembered with some place.