If you say that someone or something is on the cusp, you mean they are between two states, or are about to be in a particular state. I am sitting on the cusp of middle age. In architecture, the intersection of lobed or scalloped forms, particularly in arches (cusped arches) and tracery. Thus the three lobes of a trefoil (cloverleaf form) are separated by three cusps. Cusped forms appear in early Islamic work and were especially common in the Moorish architecture of North Africa and Spain. The form was adopted wholeheartedly by European Gothic architecture
The imaginary line that divides one house or sign from another, although some house systems regard the cusp as marking the center of the house Cusps are a subject of much discussion and disagreement Some believe that a planet on the cusp of two houses or signs will share the influence of both, while others maintain that the cusp is the strongest point, and therefore a planet on the cusp will demonstrate most clearly the influence of the sign or house it is moving into A rationalization for this latter idea is that through progression, the planet will remain for the maximum time in the applying sign or house
A curved, triangular-shaped projection from the inner curve of an arch or circle; Curves meeting in a point
Seaward bulge, approximately parabolic in shape, in the beach contours May occur singly, in the lee of an offshore bulk or island, or as one of a number of similar, approximately regularly- spaced features on a long straight beach
(1) The degree of the ecliptic where the end of one sign is separated from the beginning of the next sign; (2) the point (a zodiacal position) which marks the boundary of one house from the next