\ ˈkwäd How to pronounce quad (audio) \

Definition of quad

 (Entry 1 of 8)

Definition of quad (Entry 2 of 8)

: a type-metal space that is one en or more in width


quadded; quadding

Definition of quad (Entry 3 of 8)

transitive verb

: to fill out (something, such as a typeset line) with blank space
plural quads

Definition of quad (Entry 4 of 8)

2 : a ski lift that holds four people
3 : a quadruple toe loop in competitive figure skating
4 or less commonly quad bike : a four-wheeled all-terrain vehicle

Definition of quad (Entry 5 of 8)

1 : having or composed of four items or elements : quadruple sense 1 The F/A-18 flight-control system … is characterized by quad redundancy, which means that there are essentially four levels of sensing and actuation for each control surface.McGraw-Hill Yearbook Of Science And Technology Quad skates are roller skates that have four wheels arranged in two rows, while inline skates have them in one line.— Jenee Osterheldt
2 : quadraphonic Domestic quad listening needs two additional loudspeakers over stereo, and two more amplifiers, plus the black box which allocates some of the sounds to the rear left/right, and others to the front left/right.— George Steedman

Definition of quad (Entry 6 of 8)

: quadraphonic sound

Definition of quad (Entry 7 of 8)

: a unit of energy equal to one quadrillion British thermal units

Definition of quad (Entry 8 of 8)

: quadriceps usually used in plural

First Known Use of quad

Noun (1)

1820, in the meaning defined above

Noun (2)

circa 1879, in the meaning defined above


circa 1888, in the meaning defined above

Noun (3)

1896, in the meaning defined at sense 1


1881, in the meaning defined at sense 1

Noun (4)

1971, in the meaning defined above

Noun (5)

1974, in the meaning defined above

Noun (6)

1954, in the meaning defined above

History and Etymology for quad

Noun (2)

short for quadrat

Noun (5)

short for quadrillion

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Cite this Entry

“Quad.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quad. Accessed 3 Apr. 2020.

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More Definitions for quad


\ ˈkwäd How to pronounce quad (audio) \

Medical Definition of quad

: quadriceps usually used in plural

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More from Merriam-Webster on quad

Thesaurus: All synonyms and antonyms for quad

Rhyming Dictionary: Words that rhyme with quad

Spanish Central: Translation of quad

Nglish: Translation of quad for Spanish Speakers

Britannica English: Translation of quad for Arabic Speakers

Britannica.com: Encyclopedia article about quad

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