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The best-known type of triad is a type of musical chord consisting of three notes. A D-major triad is made up of the notes D, F-sharp, and A; an F-minor triad is made up of F, A-flat, and C; and so on. Major and minor triads form the basis of tonal music, and songs and other pieces usually end with a triadic harmony. In medicine, a triad is a set of three symptoms that go together. The Chinese criminal organizations called triads got their name from the triangular symbol that they used back when they began, centuries ago, as patriotic organizations. Today, with over 100,000 members, the triads operate in the U.S., Canada, and many other countries.
Examples of triad in a Sentence
Alex Ross, New Yorker, 23 June 2025
Hakim’s triad includes gait issues, urinary incontinence and cognitive difficulties.
—Sara Vallone, Miami Herald, 23 May 2025
So after Israel’s first strike, on June 13, China—the strongest partner in the anti-America triad—could have been expected to rush short-range missiles and other air-defense equipment to Iran.
—Leon Aron, The Atlantic, 29 June 2025
China is refitting its Type 094 ballistic missile submarines (SSBNs) with longer-range missiles and developing both a new class of SSBN and a new type of nuclear-capable bomber aircraft, further enhancing the country's nuclear triad, according to the report.
—Ryan Chan, MSNBC Newsweek, 17 June 2025
See All Example Sentences for triad
Cite this Entry
“Triad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triad. Accessed 24 Jul. 2025.
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triad
noun
Medical Definition
triad
noun
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