triad

Noun
  1. The cardinal number that is the sum of one and one and one (synset 113766184)
  2. A set of three similar things considered as a unit (synset 108002640)
  3. Three people considered as a unit (synset 108002508)
  4. A three-note major or minor chord;
    A note and its third and fifth tones (synset 106883261)

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