cusp

  1. Noun.  A sharp point or pointed end.
  2. Noun.  (figuratively) An important moment when a decision is made that will determine future events.
  3. Noun.  (geometry) A point of a curve where the curve is continuous but has no derivative, but such that it has a derivative at every nearby point.
  4. Noun.  (astrology) A boundary between zodiacal signs and houses.
  5. Noun.  (dentistry) Any of the pointed parts of a canine tooth or molar.

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This entry was last updated on RefTopia from its source on 3/20/2012.