What does contiguity mean?
Contiguity is a formal noun describing the condition of being in direct contact with, or immediately adjacent to, something else. It applies most naturally to physical space — neighbouring territories, adjoining buildings, or touching surfaces — but it also extends to time and experience, as when psychologists speak of the contiguity of a stimulus and a response. The word carries an academic tone: it appears frequently in geography (as in the 'contiguous' United States), in legal discussions of adjoining property, and in philosophy and psychology, where proximity in space or time shapes how ideas become associated. Its connotations are neutral and precise; unlike 'closeness', it implies adjacency rather than emotional warmth, and unlike 'continuity', it does not imply that anything flows uninterrupted from one thing to another — only that they meet at their edges. For writers needing exactness about what touches what, contiguity is a valuable and distinctive term.
nounThe state or fact of being in actual contact with, or immediately adjacent to, something else; nearness of position without necessarily implying physical touching.
- The state of being in direct physical contact with, or sharing a boundary with, something else (as in adjacent land, territories, or objects).
- Nearness or immediate adjacency more broadly, especially in geography, law, and psychology, where events or items are experienced as occurring together in time or place.
"The two buildings stood in close contiguity along the narrow street."
"Because of the contiguity of the two properties, any dispute over the fence line affected both owners."
"In classical conditioning, learning depends on the close contiguity of the bell and the food."
Usually treated as uncountable; the plural appears only when referring to multiple distinct instances of adjacency.
"The report mapped the various contiguities between the disputed parcels."
The 'lower 48' are called the 'contiguous United States' precisely because Alaska and Hawaii lack contiguity with them — one word quietly explains a whole map.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of contiguity
Contiguity derives from the Latin adjective 'contiguus', meaning 'touching, bordering upon', formed from the prefix 'com-' ('together') and the verb 'tangere' ('to touch') — the same root behind English words such as 'contact' and 'tangent'. The word entered English in the early seventeenth century, borrowed through scholarly Latin usage. Its adjective form 'contiguous' developed alongside it and remains the more familiar member of the family today.
Related word forms
How contiguity is actually used
Formal register; found chiefly in academic writing on geography, law, philosophy, and psychology. In psychology, 'contiguity' often refers to temporal closeness of stimuli rather than spatial contact, a sense worth flagging for readers outside those fields.
Easily confused with contiguity
'Contiguous' is the adjective describing things that touch or share a border, while 'contiguity' is the noun naming the state of being so situated.
'Continuity' refers to something continuing without interruption over time or space, whereas 'contiguity' refers only to physical adjacency or contact between separate things.