quadruplet

UK: /ˈkwɒdrʊplɪt/, /kwɒˈdruːplɪt/

US: /kwɑˈdrʌplɪt, -ˈdruplɪt, ˈkwɑdrʊplɪt/

US: (kwo drup′lit, -dro̅o̅′plit, kwod′rŏŏ plit)

WordReference Random House Learner's Dictionary of American English © 2026

quad•ru•plet /kwɑˈdrʌplɪt, -ˈdruplɪt, ˈkwɑdrʊplɪt/   n. [countable]

1. any group or combination of four.
2. Medicine one of four children or offspring born of the same mother at the same time.

See -quad-.

WordReference Random House Unabridged Dictionary of American English © 2026

quad•ru•plet  (kwo drup′lit, -dro̅o̅′plit, kwod′rŏŏ plit), n. 

1. any group or combination of four.
2. Medicine quadruplets, four children or offspring born of one pregnancy.
3. Medicine one of four such children or offspring.
4. Music and Dance a group of four notes of equal value performed in the time normally taken for three.

• quadruple + -et (modeled on triplet) 1780–90

Collins Concise English Dictionary © HarperCollins Publishers::

quadruplet / ˈkwɒdrʊplɪt kwɒˈdruːplɪt/ noun

1. one of four offspring born at one birth
2. a group or set of four similar things
3. a group of four notes to be played in a time value of three