CONTIGUITY
adjacency, contiguity, contiguousness
(noun) the attribute of being so near as to be touching
Source: WordNet® 3.1
Etymology
Noun
contiguity (countable and uncountable, plural contiguities)
A state in which two or more physical objects are physically touching one another or in which sections of a plane border on one another.
Synonyms
• (state in which objects are physically touching): synapse (of neurons)
Source: Wiktionary
Con`ti*gu"i*ty, n. Etym: [Cf. F. contiguit, LL. contiguitas.]
Definition: The state of being contiguous; intimate association; nearness;
proximity.
The convicinity and contiguity of the two parishes. T. Warton.
Source: Webster’s Unabridged Dictionary 1913 Edition