The state or condition of being adjacent or next to each other; the quality of two things being positioned alongside one another.
From 'co-' (together) + 'adjacent' (lying next to) + '-ence' (Latin suffix forming nouns). This formal term combines Latin elements to describe physical or logical proximity.
Though rarely used today, 'coadjacence' appears in older geographical and philosophical texts to describe how territories or concepts exist in close relationship—it's the kind of word that sounds fancy but just means 'nextdoor-ness.'
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