ray definition

1. a branch of an umbel or an umbelliform inflorescence
2. (mathematics) a straight line extending from a point
3. any of the stiff bony spines in the fin of a fish
4. cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
5. emit as rays
• examples: That tower rays a laser beam for miles across the sky