Definition of "Node" :

noun: (computer science) any computer that is hooked up to a computer network

noun: any bulge or swelling of an anatomical structure or part

noun: the source of lymph and lymphocytes

noun: (astronomy) a point where an orbit crosses a plane

noun: (physics) the point of minimum displacement in a periodic system

noun: (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge

noun: any thickened enlargement

noun: a connecting point at which several lines come together