In general, a node is a localised swelling (a "knot") or a point of intersection (a vertex).

Node may refer to:

In mathematics

In computing and electronics

  • NODE, a wireless handheld sensor for smart devices
  • Node (circuits), a region in an electrical circuit where there is no change in potential
  • Node (computer science), the computer representation of a node in a graph, and a basic unit used to build data structures
  • Goal node (computer science), a node in a graph that meets defined criteria for success or termination
  • Node (networking), a device such as a computer or switch attached to a computer or telecommunications network, or a point in a network topology where lines intersect or terminate
  • Mesh node, a node on a mesh network
  • Node (UML), the representation of a computational device in the Unified Modeling Language
  • Node.js, a JavaScript-based, cross-platform runtime environment
  • Node (textual), a self-contained unit of meaning within a hypertextual network
  • Node B, hardware that is connected to the mobile phone network

In science

  • Biology
  • Space
  • Physics
    • Node (physics), a point along a standing wave where the wave has minimal amplitude
  • Linguistics
    • Node (linguistics), a branch point in the Tree model, or Node Theory, of language evolution

In music

Other uses