'Proximity' definitions:

Definition of 'proximity'

From: WordNet
noun
The property of being close together [syn: proximity, propinquity]
noun
The region close around a person or thing
noun
A Gestalt principle of organization holding that (other things being equal) objects or events that are near to one another (in space or time) are perceived as belonging together as a unit [syn: proximity, law of proximity]

Definition of 'Proximity'

From: GCIDE
  • Proximity \Prox*im"i*ty\, n. [L. proximitas: cf. F. proximit['e] See Proximate, and cf. Propinquity, Approach.] The quality or state of being next in time, place, causation, influence, etc.; immediate nearness, either in place, blood, or alliance. [1913 Webster]
  • If he plead proximity of blood That empty title is with ease withstood. --Dryden. [1913 Webster]