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

On Monday, as activists armed with metal bars and makeshift battering rams were on the cusp of breaking down the doors of the Legislative Council, a group of veteran politicians sympathetic to their cause pleaded with them to reconsider. Javier C. Hernández, New York Times, "Hong Kong Protesters Storm Legislature, Dividing the Movement," 1 July 2019 School’s out, there’s a brand new mall in town, and our kid heroes are on the cusp of adulthood. Chuck Barney, Detroit Free Press, "TV highlights for the week of June 30-July 6," 30 June 2019 School’s out, there’s a brand new mall in town, and our kid heroes are on the cusp of adulthood. Chuck Barney, The Mercury News, "TV this week: ‘Stranger Things’ returns for a holiday binge," 30 June 2019 Just outside the Top 20 sit a number of cities all on the cusp of breaking through, each requiring sustained investment and implementation of bicycle innovations to see better rankings in 2021. Copenhagenize Design Co., WIRED, "The 20 Most Bike-Friendly Cities on the Planet, Ranked," 27 June 2019 Supervisor Aaron Peskin is trying once again to get a Navigation Center in his district — this time inside a shuttered car repair shop on the cusp of the Tenderloin and Polk Gulch. Trisha Thadani, SFChronicle.com, "‘Fourth time’s a charm’: Peskin proposes a different Navigation Center site for his SF district," 25 June 2019 School’s out, there’s a brand new mall in town, and the Hawkins crew are on the cusp of adulthood. Kirsten Spruch, Billboard, "'Stranger Things 3' Gets a Spooky Final Trailer: Watch," 21 June 2019 School’s out, there’s a brand new mall in town, and the Hawkins crew are on the cusp of adulthood. Jennifer Ouellette, Ars Technica, "New Stranger Things S3 trailer teases: What if the Mind Flayer never left?," 21 June 2019 Barack Obama spoke at former Senator Tom Harkin’s Iowa Steak Fry in 2006 on the cusp of his presidential campaign. Walter Shapiro, The New Republic, "On the Oratory Trail in Iowa," 11 June 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

9 Jul 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

Comments on cusp

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