nexus

noun6

1. •
   A form or state of connection.
2. •
   A centre or focus of something.

   • More than just a corporate juggernaut, Nvidia also has become an instrument of statecraft, operating at the nexus of advanced technology, diplomacy, and geopolitics. — 2025
3. •
   (US, Canada) 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.
4. •
   A connected group; a network, a web.
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).
6. •
   (historical) 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.