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on the cusp

idiom

Definition of on the cusp

: at the point when something is about to change to something else

She is on the cusp of being a star.

on the cusp between childhood and adolescence

I was born on the cusp between Leo and Virgo.

Word by Word Definitions

cusp play

: point, apex: such as
: a point of transition (as from one historical period to the next) : turning point
: either horn of a crescent moon

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