Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A group of three.
  • n. Music A chord of three tones, especially one built on a given root tone plus a major or minor third and a perfect fifth.
  • n. A section of a Pindaric ode consisting of the strophe, antistrophe, and epode.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A grouping of three.
  • n. A chord consisting of a root tone, the tone two degrees higher, and the tone four degrees higher in a given scale.
  • n. on a CRT display, a group of three neighbouring phosphor dots, coloured green, red, and blue.
  • n. A branch of a Chinese underground criminal society, mostly based in Hong Kong.

from the GNU version of the Collaborative International Dictionary of English

  • n. A union of three; three objects treated as one; a ternary; a trinity.
  • n.
  • n. A chord of three notes.
  • n. The common chord, consisting of a tone with its third and fifth, with or without the octave.
  • n. An element or radical whose valence is three.

from The Century Dictionary and Cyclopedia

  • n. plural See the Triad Society.
  • n. A union or conjunction of three; a group or class of three persons or things closely related; a trinity.
  • n. In chem., an element or radical which will combine with three atoms of a monad element or radical; a trivalent element or radical.
  • n. In music, a chord of three tones, including a given tone with its major or minor third and its perfect, augmented, or diminished fifth. A triad is named from the given tone or root: as, triad of G; dominant triad. See chord, 4. Also trias.
  • n. In Welsh lit., a form of composition characterized by the arrangement of the contents in groups of three.
  • n. In mythology, an intimate association of three kindred or correlated deities, sometimes considered as having the relationship of father, mother, and child, and forming a characteristic conception in some religious systems, as that of ancient Egypt.
  • n. In morphology, a tertiary unit of organization resulting; from integration of an aggregate of dyads. See dyad, 3.
  • n. An indeterminate product of three vectors.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. three people considered as a unit
  • n. a three-note major or minor chord; a note and its third and fifth tones
  • n. a set of three similar things considered as a unit
  • n. the cardinal number that is the sum of one and one and one

Etymologies

Late Latin trias, triad-, from Greek, the number three; see trei- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin triad-, stem of trias ("three, triad"), from Ancient Greek τριάς (trias); applied by British authorities to underground society in Hong Kong based on geometry of Chinese character. (Wiktionary)

Examples

  • Thus _e. g._, the large I shows that the triad on the first tone (in major) is a _major triad_, the small II shows that the triad on the second tone is minor, etc.

    Music Notation and Terminology

  • Rienhoff is still in the midst of this project, which he dubbed his triad transcriptome experiment—the "triad" consisting of mother, father, and offspring.

    DIY DNA: One Father's Attempt to Hack His Daughter's Genetic Code

  • Completing the triad is the intimate Transit Lounge (141 Tai An Road; 86-21-6283-3051), a favorite among Japanese men who come for the swanky red banquettes, loungey vibe and mojitos.

    Sunday Reading

  • Coming next to an Anglican Church close to you: the marriage of those in committed long-term triad relationships.

    The Anglican Church of Canada: the argument for Triad Marriages « Anglican Samizdat

  • The old tradition found its way to India (if the Hindus did not borrow the idea from the Greeks); and one of the forms of Mahadeva, the third person of their triad, is entitled “Ardhanárí” = the

    The Book of The Thousand Nights And A Night

  • I believe that, like the horse-bird-muffin triad, one is not necessarily just a dork, nerd, or geek.

    Resonant Dork Frequency

  • This triad is responsible for the profits you're enjoying right now.

    Almost two years ago...

  • Fortunately, it’s not a long or complicated manual: Nearly every part of a dog’s behavior can be described by employing three concepts I call the triad: instinct versus choice, the seven basic needs, and pain versus pleasure.

    30 Days to a Well-Mannered Dog

  • Burke was there for the birth of the so-called triad, the three-sided nuclear force—missiles, manned bombers, and submarines—the U.S. was embarked upon building.

    How the End Begins

  • How reward power is distributed in the triad has been the focus of experiments regarding the bargaining process.

    The Bass Handbook of Leadership

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.

  • 1546 St. Papers Hen. VIII, XI. 341 Two thynges I noted in thEmperour, diligent herynge of me, and good wordys; yf deadis shal nowe folowe accordingely, the triade shall be perfecte.

    May 20, 2008