The quality or property of being situated, occurring, or existing between two points, objects, or concepts; the state of occupying a middle position.
From 'between' with the common English suffix '-ness' (Old English '-nes') that creates abstract nouns from adjectives. This is a standard formation describing the essential quality of 'between-ness.'
In mathematics and network science, 'betweenness' is a crucial measure—nodes or people with high 'betweenness centrality' are crucial connectors in networks, making them the real power brokers in social or computer systems.
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