See proximity in Webster's New World College Dictionary
noun
the state or quality of being near; nearness in space, time, etc.
See proximity in American Heritage Dictionary 4
(prŏk-sĭmˈĭ-tē)
noun
The state, quality, sense, or fact of being near or next; closeness: “Swift's major writings have a proximity and a relevance that is splendidly invigorating”(M.D. Aeschliman). See Usage Note at redundancy.