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The Definition of - ray (noun)

noun
1.
a narrow beam of light.
2.
a gleam or slight manifestation:
a ray of hope.
3.
a raylike line or stretch of something.
4.
light or radiance.
5.
a line of sight.
6.
Physics, Optics.
1. any of the lines or streams in which light appears to radiate from a luminous body.
2. the straight line normal to the wave front in the propagation of radiant energy.
3. a stream of material particles all moving in the same straight line.
7.
Mathematics.
1. one of a system of straight lines emanating from a point.
2. Also called half-line. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point.
8.
any of a system of parts radially arranged.
9.
Zoology.
1. one of the branches or arms of a starfish or other radiate animal.
2. one of the bony or cartilaginous rods in the fin of a fish.
10.
Botany.
1. ray flower.
2. one of the branches of an umbel.
3. vascular ray.
4. (in certain composite plants) the marginal part of the flower head.
11.
Astronomy. one of many long, bright streaks radiating from some of the large lunar craters.
12.
a prominent upright projection from the circlet of a crown or coronet, having a pointed or ornamented termination.
verb (used without object)
13.
to emit rays.
14.
to issue in rays.
verb (used with object)
15.
to send forth in rays.
16.
to throw rays upon; irradiate.
17.
to subject to the action of rays, as in radiotherapy.
18.
Informal. to make a radiograph of; x-ray.
19.
to furnish with rays or radiating lines.
Idioms
20.
get / grab some rays, Slang. to relax in the sun, especially to sunbathe.