cusp

noun \ ˈkəsp \
Updated on: 17 Nov 2017

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 3foil 4)
e (1) :a point on the grinding surface of a tooth
(2) :a fold or flap of a cardiac valve

cuspate

play \ˈkə-ˌspāt, -spət\ adjective

cusped

play \ˈkəspt\ adjective

Examples of cusp in a Sentence

  1. the cusp of a tooth

  2. medical researchers who are on the cusp of a major breakthrough

Recent Examples of cusp from the Web

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.

Illustration of cusp

Origin and Etymology of cusp

Latin cuspis point

cusp Synonyms

Synonyms
brink, point, edge, threshold, verge
Related Words
nick


CUSP Defined for English Language Learners

cusp

noun

Definition of cusp for English Language Learners

  • : a pointed end or part where two curves meet


CUSP Defined for Kids

cusp

noun \ ˈkəsp \

Definition of cusp for Students

:a point or pointed end
  • the cusp of a tooth

Medical Dictionary

cusp

noun \ ˈkəsp \

medical Definition of cusp

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

cuspal

play \ˈkəs-pəl\ adjective


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