cusp

[ kuhsp ]
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noun
  1. a point or pointed end.

  2. Anatomy, Zoology, Botany. a point, projection, or elevation, as on the crown of a tooth.

  1. Also called spinode. Geometry. a point where two branches of a curve meet, end, and are tangent.

  2. Architecture. a decorative device, used especially in Gothic architecture to vary the outlines of intradoses or to form architectural foils, consisting of a pair of curves tangent to the real or imaginary line defining the area decorated and meeting at a point within the area.

  3. Astronomy. a point of a crescent, especially of the moon.

  4. Astrology.

    • the zodiacal degree that marks the beginning of a house or a sign.

    • Informal. a person born on the first day of a sign.

  5. a point that marks the beginning of a change: on the cusp of a new era.

Origin of cusp

1
First recorded in 1575–85, cusp is from the Latin word cuspis a point

Other words from cusp

  • cuspal, adjective

Words Nearby cusp

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use cusp in a sentence

British Dictionary definitions for cusp

cusp

/ (kʌsp) /


noun
  1. any of the small elevations on the grinding or chewing surface of a tooth

  2. any of the triangular flaps of a heart valve

  1. a point or pointed end

  2. Also called: spinode geometry a point at which two arcs of a curve intersect and at which the two tangents are coincident

  3. architect a carving at the meeting place of two arcs

  4. astronomy either of the points of a crescent moon or of a satellite or inferior planet in a similar phase

  5. astrology any division between houses or signs of the zodiac

Origin of cusp

1
C16: from Latin cuspis point, pointed end

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012