1. a pointed end where two curves meet
2. the verge or beginning of something; a transitional point
3. a pointed projection on the crown of a tooth
Usage: anatomy

Examples

• The crescent moon showed a sharp cusp against the dark sky.
• She stood on the cusp of a major career change.
• The country is on the cusp of economic recovery.
• The dentist examined the cusp of her molar.
• He was born on the cusp between Leo and Virgo.
• The mountain peak formed a dramatic cusp against the horizon.