triad

A triad is three things or people considered as one unit. A triad is a trio.

A triangle is a shape with three sides. Similarly, a triad is a set of three things or people. To be a triad, three individual parts must also be considered a unit. A band with three members is a triad. A business with three divisions is a triad. A family with three members is a triad. A book with three volumes is a triad (usually called a trilogy). Triads are also called threesomes and trios.

Definitions of triad
1

n a set of three similar things considered as a unit

Synonyms:
trio, triple, triplet
Examples:
Trimurti
the triad of divinities of later Hinduism
Types:
trilogy
a set of three literary or dramatic works related in subject or theme
trigon, triplicity
(astrology) one of four groups of the zodiac where each group consists of three signs separated from each other by 120 degrees
Type of:
set
a group of things of the same kind that belong together and are so used

n three people considered as a unit

Synonyms:
threesome, trinity, trio
Types:
triumvirate
a group of three men responsible for public administration or civil authority
troika
a modern Russian triumvirate
Type of:
assemblage, gathering
a group of persons together in one place

n a three-note major or minor chord; a note and its third and fifth tones

Synonyms:
common chord
Type of:
chord
a combination of three or more notes that blend harmoniously when sounded together

n the cardinal number that is the sum of one and one and one

Synonyms:
3, III, deuce-ace, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, trine, trinity, trio, triplet, troika
Type of:
digit, figure
one of the elements that collectively form a system of numeration

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.