Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

triad

play
noun tri·ad \ˈtrī-ˌad also -əd\

Simple Definition of triad

  • : a group of three usually related people or things

  • : a secret Chinese criminal organization

Full Definition of triad

  1. 1 :  a union or group of three :  trinity

  2. 2 :  a chord of three tones consisting of a root with its third and fifth and constituting the harmonic basis of tonal music

tri·ad·ic play \trī-ˈa-dik\ adjective
tri·ad·i·cal·ly play \-di-k(ə-)lē\ adverb

Examples of triad

  1. <a triad of candlesticks on the mantle>



Origin of triad

Latin triad-, trias, from Greek, from treis three


First Known Use: 1546


Medical Dictionary

triad

play
noun tri·ad \ˈtrī-ˌad also -əd\

Medical Definition of triad

  1. 1:  a union or group of three <a triad of symptoms>

  2. 2:  a trivalent element, atom, or radical

  3. tri·ad·ic \trī-ˈad-ik\play adjective





Seen and Heard

What made you want to look up triad? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

196.5 pounds 2.2 pounds 16.96 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ