1. a connection or link between things, people, or ideas
2. a central point where things come together; a focal point

Examples

• The city serves as a nexus for international trade.
• There’s a clear nexus between poverty and crime in this area.
• The university became a nexus of scientific research.
• She found the nexus between art and technology fascinating.
• The airport is a major transportation nexus for the region.
• The nexus of the problem lies in poor communication.
• This café has become the social nexus of our neighborhood.