Collins English-English Dictionary

cusp [k^sp]

1. 1. n [geometry] spinode a point at which two arcs of a curve intersect and at which the two tangents are coincident

2. 2. n any of the small elevations on the grinding or chewing surface of a tooth

3. 3. n any of the triangular flaps of a heart valve

4. 4. n a point or pointed end

5. 5. n [architect] a carving at the meeting place of two arcs

6. 6. n [astronomy] either of the points of a crescent moon or of a satellite or inferior planet in a similar phase

7. 7. n [astrology] any division between houses or signs of the zodiac

8. 8. n [Etymology] C16: from Latin cuspis point, pointed end