nexus

1. A form or state of connection. (countable, uncountable)
2. The relationship between a vendor and a jurisdiction for the purpose of taxation, established for example by the vendor operating a physical store in that jurisdiction. (US, countable, uncountable)
3. A connected group; a network, a web. (countable, uncountable)
4. A centre or focus of something. (countable, uncountable)
5. In the work of the Danish linguist Otto Jespersen (1860–1943): a group of words expressing two concepts in one unit (such as a clause or sentence). (countable, uncountable)
6. A person who had contracted a nexum or obligation of such a kind that, if they failed to pay, their creditor could compel them to work as a servant until the debt was paid; an indentured servant. (countable, uncountable)

Plural nexuses