The fact or condition of immediate succession or proximity; the quality of being next.(noun)
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Use "nextness" in a sentence
"The Anglo-American cultural perspective is future-time oriented, or "nextness" oriented, to use a phrase coined by cultural diversity expert Tom Kochman."
"Union of various grades, union of diverse types, union that stops at non-conductors, union that merely goes from next to next, and means in many cases outer nextness only, and not a more internal bond, union of concatenation, in short; all that sort of thing seems to you a halfway stage of thought."