[ nohd ]
See synonyms for node on
  1. a centering point of component parts: The electrical connections all ran through a central node.

  2. a knot, protuberance, or knob: protruding nodes on a bicycle seat.

  1. Anatomy. a knotlike mass of tissue: lymph node.

  2. Pathology. a circumscribed swelling.

  3. Botany.

    • a joint in a stem.

    • a part of a stem that normally bears a leaf.

  4. Computers.

    • a connection point in a network that is a processing device with an assigned address, as a router, computer terminal, peripheral device, or mobile device: nodes on the internet;In a well-designed network, the failure of one computer node does not cause a failure in the network.

    • a data point or cluster within a tree or other information structure, as defined by its relationship to another data point or cluster: The directory node governs several constituent files.The nodes in an artificial neural network are connected to each other to send and receive information, much like the neurons of the human brain.

  5. Mathematics. knot1 (def. 12).

  6. Geometry. a point on a curve or surface at which there can be more than one tangent line or tangent plane.

  7. Physics. a point, line, or region in a standing wave at which there is relatively little or no vibration.

  8. Astronomy. either of the two points at which the orbit of a heavenly body intersects a given plane, especially the plane of the ecliptic or of the celestial equator.: Compare ascending node, descending node.

  9. Linguistics. an element of a tree diagram that represents a constituent of a linguistic construction.

  10. Optics. nodal point.

  11. Engineering. panel point.

Origin of node

First recorded in 1420–45; Middle English, from Latin nōdus “knot” Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use node in a sentence

  • If there are only fifteen power nodes, then how come there were so many different Gods and Goddesses among the Greeks?

    Pagan Passions | Gordon Randall Garrett
  • The nodes of the moon's orbit are not stationary, but have a daily retrograde motion of 3´ 10·64´´.

    The Astronomy of the Bible | E. Walter Maunder
  • Combining this with the expression for the two nodes, the Hindu myth has taken the following form.

    The Astronomy of the Bible | E. Walter Maunder
  • This relation might be briefly expressed by saying that the Dragon—that is of the nodes—causes the eclipse.

    The Astronomy of the Bible | E. Walter Maunder
  • There were four open WiFi nodes visible from the board room and I told it to change between them at random intervals.

    Little Brother | Cory Doctorow

British Dictionary definitions for node


/ (nəʊd) /

  1. a knot, swelling, or knob

  2. the point on a plant stem from which the leaves or lateral branches grow

  1. physics a point at which the amplitude of one of the two kinds of displacement in a standing wave has zero or minimum value. Generally the other kind of displacement has its maximum value at this point: See also standing wave Compare antinode

  2. Also called: crunode maths a point at which two branches of a curve intersect, each branch having a distinct tangent

  3. maths linguistics one of the objects of which a graph or a tree consists; vertex

  4. astronomy either of the two points at which the orbit of a body intersects the plane of the ecliptic. When the body moves from the south to the north side of the ecliptic, it passes the ascending node; moving from the north to the south side, it passes the descending node

  5. anatomy

    • any natural bulge or swelling of a structure or part, such as those that occur along the course of a lymphatic vessel (lymph node)

    • a finger joint or knuckle

  6. computing an interconnection point on a computer network

Origin of node

C16: from Latin nōdus knot

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for node


[ nōd ]

  1. Anatomy A small mass or lump of body tissue that either occurs naturally, as in the case of lymph nodes, or is a result of disease.

    • A point on a stem where a leaf is or has been attached.

    • A swelling or lump on a tree; a knob or knot.

  1. Physics A point or region of a vibrating or oscillating system, such as the standing wave of a vibrating guitar string, at which the amplitude of the vibration or oscillation is zero. Harmonic frequencies in oscillating systems always have nodes. Compare antinode.

    • Either of the two points on the celestial sphere at which the path of a revolving body, such as the Moon, a planet, or a comet, intersects the ecliptic.♦ The point at which the body traverses from south of the ecliptic to north is the ascending node. The opposite point, when the body traverses the ecliptic from north to south, is the descending node.

    • Either of the two points at which the orbit of an artificial satellite intersects the equatorial plane of the planet it is orbiting.

  2. Computer Science A computer or a peripheral that is connected to a network.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.