- cusp
- cusp [kusp]n.[L cuspis (gen. cuspidis), point, pointed end, spear]1. a point or pointed end; apex; peak2. Anat.a) any of the elevations on the chewing surface of a toothb) any of the triangular flaps of a heart valve3. Archit. a projecting point where two arcs meet, as in the internal curve of an arc4. Astrol. the transitional part of a sign or house5. Astron. either horn of a crescent, as of the moon6. Geom. the tip of a pointed curve——————on the cusp1. Astrol. at or during a CUSP (sense 4)2. at or during a time of transition, as the moment of or just before a major change or event
English World dictionary. V. Neufeldt. 2014.