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

ray

1 American  
[rey] / 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  
[rey] / 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  
[rey, 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. 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 3 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 4 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 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:

"There wasn't a single ray of light coming through a crack in the rubble; despair threatened to overwhelm me," Cordido told AFP from his daughter's house in Caracas.

From Barron's Jul. 4, 2026

The team also tested whether the proposed blazar population would produce too many gamma rays compared with the known extragalactic gamma ray background measured by Fermi.

From Science Daily May 24, 2026

For economists looking on, the budgetary measures present a ray of hope that a more extensive reform agenda is taking shape—one that will boost the economy’s ability to grow faster without fueling inflation.

From The Wall Street Journal May 12, 2026

Like a ray of sunshine on a cloudy day, the 2026 Eurovision Song Contest has arrived to dispel the gloom of a weary world.

From BBC May 8, 2026

Five minutes later Lyra had forgotten the moral, but she hadn’t forgotten the little whirling vanes in the ray of dusty light.

From "The Golden Compass" by Philip Pullman

Colson Whitehead’s latest foray into the bent world of “reluctant fence” Ray Carney — “Cool Machine,” the third and final installment of his Harlem Trilogy — is an American epic disguised as a heist novel.

From Los Angeles Times Jul. 20, 2026

"A lot of my friends have felt disconnected the entire tournament due to the tickets being unaffordable," added Ray.

From Barron's Jul. 19, 2026

Earlier this year, the Lord Mayor of Dublin, Councillor Ray McAdam, proposed that she should receive the freedom of the city, describing her as "one of Dublin's most distinguished cultural figures".

From BBC Jul. 17, 2026

I got 451, a score fit for Ray Bradbury.

From Slate Jul. 10, 2026

When he heard their plight, Governor Ray’s press secretary, Ray Walters, took pity on the two programs.

From "Mountain of Fire" by Rebecca E. F. Barone

As dawn breaks over Ghana's Atlantic coast, artisanal fishing boats return to shore with last night's catch -- baskets of snapper, crabs, rays and a distinct-looking fish locals call "esene".

From Barron's Jul. 23, 2026

Zinc oxide is widely used in mineral sunscreen because it blocks UVA rays, which contribute to skin aging, as well as UVB rays, which cause sunburn and increase the risk of skin cancer.

From Science Daily Jul. 20, 2026

Morgan said they hoped to build on the island's long history of shark research by raising awareness, supporting further scientific studies and helping protect sharks, skates and rays in Manx waters for the future.

From BBC Jul. 11, 2026

The gray skies part, the clouds lift and a warm maternal comfort spreads across the film, creeping in like the sun’s rays falling on cobblestones still shining from a sudden downpour.

From Salon Jun. 29, 2026

With his right hand he shook a torch whose rays spread out in all directions lighting the depths of the waters and penetrating into the bowels of the earth.

From "The Invention of Science" by David Wootton

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

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

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

On Wolf Mountain died the light; A colossal blossom, rayed With rent petaled clouds that played 'Round a calyxed fury bright.

From Accolon of Gaul with Other Poems by Cawein, Madison Julius

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

She gave Winona her pretty silver ring with its raying fagots, and repeating the formula which went with it.

From Winona of the Camp Fire by Widdemer, Margaret

God summoning and calling, in that sense, men to Himself, by the raying out of His own perfect beauty, and the might with which the beams go forth into the darkness.

From Expositions of Holy Scripture Ephesians; Epistles of St. Peter and St. John by Maclaren, Alexander

Still philosophy is saying: "Now that hope with life seems gone, Some are cursing, some are praying, God smiles raying in the dawn!"

From Days and Dreams Poems by Cawein, Madison J.

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