What is the meaning of ray?

noun

• A column of light (as from a beacon.
  • synonyms: beam, beam of light, light beam, ray of light, shaft, shaft of light, irradiation
• A branch of an umbel or an umbelliform inflorescence.
• Mathematics) a straight line extending from a point. (
• A group of nearly parallel lines of electromagnetic radiation.
  • synonyms: beam, electron beam
• The syllable naming the second (supertonic) note of any major scale in solmization.
  • synonyms: re
• Any of the stiff bony spines in the fin of a fish.
• Cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins.

verb

• Emit as rays.
  • usage: "That tower rays a laser beam for miles across the sky"
• Extend or spread outward from a center or focus or inward towards a center.
  • usage: "spokes radiate from the hub of the wheel"; "This plants radiate spines in all directions"
  • synonyms: radiate
• Expose to radiation.
  • usage: "irradiate food"
  • synonyms: irradiate