means A connecting point in a network, structure, or system — a junction where lines, paths, or relationships meet.

from From Latin nodus, 'a knot' — a cousin of 'noose.' To a Roman, a node was the literal lump where threads bound together, or the swollen joint of a plant stem. Centuries later, mathematicians and engineers borrowed the knot as a metaphor: a place where things tie up, branch off, or converge. The internet simply inherited the rope.