From Longman Dictionary of Contemporary Englishcuspcusp /kʌsp/ noun 1 CF[countable] technical the point formed where two curves join2 → be on the cusp of something3 → on the cusp
Examples from the Corpus
cusp• You see, I was on my astrological cusp on Monday, it wasn't at all propitious for me.• As the world approached the cusp of a new millennium, the fire was still spreading.• To simplify the figure, its effect is shown on a projection of the cusp on to a horizontal plane.• The alternative path a-d, by just reaching the higher side of the cusp, leads to a high level of success.• Death becomes him, for ever frozen in time as a complex and charismatic 24-year-old on the cusp of greatness.• On the cusp of restructuring family life, we cling ever more ardently to this antiquated and ill-conceived provider-homemaker design.Origin cusp (1500-1600) Latin cuspis “point” 