cusp

noun
\ ˈkəsp How to pronounce cusp (audio) \

Definition of cusp

: point, apex: such as
a : a point of transition (as from one historical period to the next) : turning point also : edge, verge on the cusp of stardom … you're on the cusp between heat exhaustion and life-threatening heatstroke. — Mark Jannot
b : either horn of a crescent moon
c : a fixed point on a mathematical curve at which a point tracing the curve would exactly reverse its direction of motion
d : an ornamental pointed projection formed by or arising from the intersection of two arcs or foils (see foil entry 2 sense 4)
e(1) : a point on the grinding surface of a tooth
(2) : a fold or flap of a cardiac valve

Illustration of cusp

Illustration of cusp

1 cusp d

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Other Words from cusp

cuspate \ ˈkə-​ˌspāt How to pronounce cuspate (audio) , -​spət \ adjective
cusped \ ˈkəspt How to pronounce cusped (audio) \ adjective

Examples of cusp in a Sentence

the cusp of a tooth medical researchers who are on the cusp of a major breakthrough

Recent Examples on the Web

Then came The RuPaul Show on VH1, which ran for 100 episodes and placed him on the cusp of the mainstream. Abby Aguirre, Vogue, "How the World Fell Head Over Heels for RuPaul," 15 Apr. 2019 At that point, Harry and William were on the cusp of beginning their military careers. Rachel Epstein, Marie Claire, "Royal Reporter Katie Nicholl on Harry and Meghan's Next Chapter," 8 Apr. 2019 The Federal Aviation Administration is reportedly on the cusp of approving a safety update that could make the seemingly disaster-prone aircraft viable again, the Wall Street Journal reported Sunday. Sam Blum, Popular Mechanics, "FAA 'Tentatively' Approves Software Update For The Grounded Boeing 737 Max 8," 25 Mar. 2019 Fast forward to the cusp of the millennium: Vogue included a charming orange quarter-length sleeve boatneck shirt by Petite Bateau in their May 1999 Index. Liana Satenstein, Vogue, "In Defense of Meghan Markle’s Beloved Boatneck Dress," 30 July 2018 That new lineup of planes has brought the regional jetmaker’s planes right up to the cusp of the smallest models offered by Boeing (the 737) and Airbus (the A320 family). Ben Mutzabaugh, USA TODAY, "Say 'so long' to Bombardier’s CSeries jets; they're now 'Airbus A220s'," 10 July 2018 The Nasdaq Composite is on the cusp of exiting a bear market, rebounding nearly 20% from its Christmas Eve low and highlighting the resilience of the technology shares that have long powered the market higher. WSJ, "Tech Rally Puts Nasdaq on Cusp of Exiting Bear Market," 6 Feb. 2019 Yet for many, the flush of that victory has given way to the realization that Baghdad, once a jewel among Arab capitals and now on the cusp of achieving megacity status, is barely functional. Nabih Bulos, The Seattle Times, "Baghdad, once a jewel among Arab capitals, is barely functional," 28 Jan. 2019 Now, the eccentric style maven is on the cusp of entering the mainstream. Liana Satenstein, Vogue, "Kerwin Frost, Fashion’s Funniest Man, Has Serious Street Style," 18 Jan. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cusp.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cusp

1585, in the meaning defined above

History and Etymology for cusp

Latin cuspis point

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Statistics for cusp

Last Updated

30 Apr 2019

Look-up Popularity

Time Traveler for cusp

The first known use of cusp was in 1585

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More Definitions for cusp

cusp

noun

English Language Learners Definition of cusp

technical : a pointed end or part where two curves meet

cusp

noun
\ ˈkəsp How to pronounce cusp (audio) \

Kids Definition of cusp

: a point or pointed end the cusp of a tooth

cusp

noun
\ ˈkəsp How to pronounce cusp (audio) \

Medical Definition of cusp

1 : a point on the grinding surface of a tooth
2 : a fold or flap of a cardiac valve

Other Words from cusp

cuspal \ ˈkəs-​pəl How to pronounce cuspal (audio) \ adjective

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More from Merriam-Webster on cusp

Thesaurus: All synonyms and antonyms for cusp

Spanish Central: Translation of cusp

Nglish: Translation of cusp for Spanish Speakers

Britannica.com: Encyclopedia article about cusp

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