OED
3.
1971 A central point or point of convergence; a focus; a meeting-place.1971 There are new trends towards treating the library as a nexus for resource centre development. in T. D. F. Barnard, New Direct. in Librarianship 44
1987 Homespun tracts described it [sc. the Federal Reserve] as the secret nexus for sinister forces in the world. W. Greider, Secrets of Temple ii. ii. 52
1992 The Royalton has become the beanery of choice, the nexus for the elegant editors of the high-profile magazines and Seventh Avenue designers. New York Times 27 December ix. 5/1