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  • ray
    ray
    noun
    a narrow beam of light.
  • Ray
    Ray
    noun
    John, 1627?–1705, English naturalist.
Synonyms

ray

1 American  
[ray] / reɪ /

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)

  • rays,
    present (3rd person singular)
  • rayed,
    past participle,  past
  • raying
    present participle
  1. to emit rays.

  2. to issue in rays.

verb (used with object)

  • rays,
    present (3rd person singular)
  • rayed,
    past participle,  past
  • raying
    present participle
  1. to send forth in rays.

  2. to throw rays upon; irradiate.

  3. to subject to the action of rays, as in radiotherapy.

  4. Informal. to make a radiograph of; x-ray.

  5. to furnish with rays or radiating lines.

idioms

  1. get / grab some rays, to relax in the sun, especially to sunbathe.

ray 2 American  
[ray] / reɪ /

noun

  1. any of numerous elasmobranch fishes, adapted for life on the sea bottom, having a flattened body and greatly enlarged pectoral fins with the gills on the undersides.


Ray 3 American  
[ray, rahy] / reɪ, raɪ /

noun

  1. John, 1627?–1705, English naturalist.

  2. Man 1890–1976, U.S. painter and photographer.

  3. Satyajit 1921–92, Indian film director.

  4. Cape, a promontory at the SW extremity of Newfoundland, Canada, on the Cabot Strait, at the entrance of the Gulf of St. Lawrence.

  5. a male given name, form of Raymond.

  6. Also Raye a female given name, form of Rachel.


ray 1 British  
/ reɪ /

noun

  1. a narrow beam of light; gleam

  2. a slight indication, esp of something anticipated or hoped for

    a ray of solace

  3. maths a straight line extending from a point

  4. a thin beam of electromagnetic radiation or particles

  5. any of the bony or cartilaginous spines of the fin of a fish that form the support for the soft part of the fin

  6. any of the arms or branches of a starfish or other radiate animal

  7. astronomy any of a number of bright streaks that radiate from the youngest lunar craters, such as Tycho; they are composed of crater ejecta not yet darkened, and extend considerable distances

  8. botany any strand of tissue that runs radially through the vascular tissue of some higher plants See medullary ray

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. (of an object) to emit (light) in rays or (of light) to issue in the form of rays

  2. (intr) (of lines, etc) to extend in rays or on radiating paths

  3. (tr) to adorn (an ornament, etc) with rays or radiating lines

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
ray 2 British  
/ reɪ /

noun

  1. any of various marine selachian fishes typically having a flattened body, greatly enlarged winglike pectoral fins, gills on the undersurface of the fins, and a long whiplike tail. They constitute the orders Torpediniformes ( electric rays ) and Rajiformes

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Ray 3 British  
/ reɪ /

noun

  1. John . 1627–1705, English naturalist. He originated natural botanical classification and the division of flowering plants into monocotyledons and dicotyledons

  2. Man , real name Emmanuel Rudnitsky . 1890–1976, US surrealist photographer

  3. Satyajit (ˈsætjədʒɪt). 1921–92, Indian film director, noted for his Apu trilogy (1955–59)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ray 4 British  
/ reɪ /

noun

  1. music (in tonic sol-fa) the second degree of any major scale; supertonic

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Ray 5 British  
/ reɪ /

noun

  1. a promontory in SW Newfoundland, Canada

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ray Scientific  
/ rā /
  1. A thin line or narrow beam of light or other radiation.

  2. A geometric figure consisting of the part of a line that is on one side of a point on the line.

  3. See ray flower


Synonym Usage

See gleam.

Other Word Forms

Derived Forms

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future


Etymology

Origin of ray1

First recorded in 1350–1400; Middle English rai, raie, raye, from Old French rai “beam of light; spoke of a wheel,” from Latin radius radius

Origin of ray2

First recorded in 1275–1325; Middle English rai(e), raye, (from Old French rai ) or directly from Latin raia


Explanation

A ray is a beam of light or radiation. Even on cloudy days, you sometimes see a ray of sunlight shine through the clouds. In physics, a ray is a line or column of light, heat, or electromagnetic radiation (like an x-ray), while in math a ray is a line that passes through a specific point. A marine biologist would define a ray as a big fish that's related to sharks and has a wide, flat body and a long tail. The root of the first two kinds of rays is the Latin word radius, "spoke" or "staff."

Keep Reading on Vocabulary.com

Vocabulary lists containing ray

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

She’s a ray of light; he’s magnetically mature.

From Los Angeles Times ● Sep. 20, 2026

Nearly a mile of rock above the experiment blocks much of the cosmic ray radiation arriving from space.

From Science Daily ● Sep. 4, 2026

Ms Mullan described her daughter Amelia as "a ray of sunshine," who "had the most beautiful curls and a creativity that shone through everything that she did".

From BBC ● Jul. 31, 2026

The JetZero aircraft looks more like a manta ray than the tube-with-wings blueprint that has been the default for over 70 years.

From The Wall Street Journal ● Jul. 29, 2026

With the alien tech in his ray gun.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith

Ray Dalio, founder of Bridgewater Associates, has warned that AI stocks have become detached from financial fundamentals, pushing markets to precarious highs.

From Los Angeles Times ● Oct. 25, 2026

The lender has seen graduate loans grow between 300% and 400% from last year, according to Ray Jones, its chief product officer.

From The Wall Street Journal ● Oct. 22, 2026

"For years, research has shown that people often mistake a wider cone for a bigger storm," Ray said.

From Science Daily ● Oct. 20, 2026

Hafeez referenced the six-stage framework on debt and world order put forward by Ray Dalio, the founder of hedge-fund giant Bridgewater Associates.

From MarketWatch ● Oct. 19, 2026

“Lou Ann said you told her you were going for a walk,” Ray says, a deep crease between his brows.

From "The Tenth Mistake of Hank Hooperman" by Gennifer Choldenko

Radiocarbon levels are influenced by cosmic rays reaching Earth's atmosphere.

From Science Daily ● Oct. 26, 2026

Among the diverse habitats are a salt marsh that serves as a nursery for leopard sharks and bat rays and kelp forests frequented by harbor seals and wrasses.

From Los Angeles Times ● Oct. 19, 2026

Scientists had previously been unable to obtain 3D magnetic images of large particles such as giant magnetofossils because conventional X rays could not penetrate them effectively.

From Science Daily ● Oct. 2, 2026

Once in orbit, the chip will have to survive being bombarded by cosmic rays and solar events.

From The Wall Street Journal ● Oct. 1, 2026

Abbot Mortimer pointed at the first rays of sun streaming in through the window.

From "Redwall" by Brian Jacques

The initiative seeks to restore the rayed bean mussel, which has not been found in Kentucky waters in more than 40 years.

From Washington Times ● Sep. 15, 2020

Some of the brighter craters are rayed, like Tycho and Copernicus on the Moon, and many have central peaks.

From Textbooks ● Oct. 13, 2016

Instead, our results imply that derived colour-pattern elements have introgressed recently between both rayed and postman forms of and .

From Nature ● Jul. 4, 2012

For a reciprocal test, we used the same H. melpomene races as the ingroup to compare with rayed Heliconius timareta florencia at the B/D region.

From Nature ● Jul. 4, 2012

A variety of fennel, F. dulce, having the stem compressed at the base, and the umbel 6-8 rayed, is grown in kitchen-gardens for the sake of its leaves.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" by Various

Ever since Colonel Lindbergh flew one across the Atlantic in 1927, most U. S. aeronautical engineers have been developing air-cooled, radial engines with cylinders raying out like huge wheel-spokes around a short, chunky crankshaft.

From Time Magazine Archive

She was looking around the hem to see if the quilt maker had stitched in her initials, but the edges were all raying away.

From "A Long Way from Chicago" by Richard Peck

In the picture of "Progress," which he loved, there was a glow, a glory of light, raying out to a far horizon.

From Bella Donna A Novel by Robert Smythe Hichens

The Mercutians were pounding along methodically raying in front of them.

From Slaves of Mercury by Nathan Schachner

He conquers as the sun conquers the thick-ribbed ice by raying down its heat upon it, and melting it into sweet water.

From Expositions of Holy Scripture: Romans Corinthians (To II Corinthians, Chap. V) by Alexander Maclaren

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