flare

American  

[flair] / flɛər /

verb (used without object)

• flares,
  present (3rd person singular)
• flared,
  past participle,  past
• flaring
  present participle

1. to burn with an unsteady, swaying flame, as a torch or candle in the wind.

   Synonyms:

   flame

2. to blaze with a sudden burst of flame (often followed byup ).

   The fire flared up as the paper caught.

3. to start up or burst out in sudden, fierce intensity or activity (often followed byup ).

   His stomach problems have flared up.

4. to become suddenly enraged; express sudden, fierce anger or passion (usually followed by up orout ).

   I’m not a person who flares easily. She sometimes flares out at the kids.

   Synonyms:

   flame, blaze, flash, explode, erupt

5. to shine or glow.

6. to spread gradually outward, as the end of a trumpet, the bottom of a wide skirt, or the sides of a ship.

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verb (used with object)

• flares,
  present (3rd person singular)
• flared,
  past participle,  past
• flaring
  present participle

1. to cause (a candle, torch, etc.) to burn with a swaying flame.

2. to display conspicuously or ostentatiously.

3. to signal by flares of fire or light.

4. to cause (something) to spread gradually outward in form.

5. Metallurgy. to heat (a high-zinc brass) to such a high temperature that the zinc vapors begin to burn.

6. to discharge and burn (excess gas) at a well or refinery.

noun

• flares
  plural

1. a flaring or swaying flame or light, as of torches in the wind.

2. a sudden blaze or burst of flame.

   Synonyms:

   flash

3. a bright blaze of fire or light used as a signal, a means of illumination or guidance, etc.

4. a device or substance used to produce such a blaze of fire or light.

5. a sudden burst, as of zeal or of anger.

6. a gradual spread outward in form; outward curvature.

   the flare of a skirt.

7. something that spreads out.

8. Optics. light, often unwanted or extraneous, reaching the image plane of an optical instrument, as a camera, resulting from reflections, scattering by lenses, and the like.

9. Photography. a fogged appearance given to an image by reflection within a camera lens or within the camera itself.

10. Also called solar flare.  Astronomy. a sudden and brief brightening of the solar atmosphere in the vicinity of a sunspot that results from an explosive release of particles and radiation.

11. Football. a short pass thrown to a back who is running toward a sideline and is not beyond the line of scrimmage.

12. Television. a dark area on a CRT picture tube caused by variations in light intensity.

flare British  

/ flɛə /

verb

1. to burn or cause to burn with an unsteady or sudden bright flame

2. to spread or cause to spread outwards from a narrow to a wider shape

3. (tr) to make a conspicuous display of

4. to increase the temperature of (a molten metal or alloy) until a gaseous constituent of the melt burns with a characteristic flame or (of a molten metal or alloy) to show such a flame

5. (in the oil industry) to burn off (unwanted gas) at an oil well

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noun

1. an unsteady flame

2. a sudden burst of flame

3. 1. a blaze of light or fire used to illuminate, identify, alert, signal distress, etc

   2. the device producing such a blaze

4. a spreading shape or anything with a spreading shape

   a skirt with a flare

5. a sudden outburst, as of emotion

6. optics

   1. the unwanted light reaching the image region of an optical device by reflections inside the instrument, etc

   2. the fogged area formed on a negative by such reflections See also solar flare

7. astronomy short for solar flare

8. aeronautics the final transition phase of an aircraft landing, from the steady descent path to touchdown

9. an open flame used to burn off unwanted gas at an oil well

Other Word Forms

Derived Forms

• outflare
  verb (used with object)
• flared
  adjective
• unflared
  adjective

Inflected Forms

Nouns

• flares
  plural

Participles

• flaring
  present
• flared
  past

Conjugated Forms

Present

• flare
  simple
• flares
  simple
• have flared
  perfect
• has flared
  perfect
• am flaring
  progressive
• are flaring
  progressive
• is flaring
  progressive
• have been flaring
  perfect progressive
• has been flaring
  perfect progressive

Past

• flared
  simple
• had flared
  perfect
• was flaring
  progressive
• were flaring
  progressive
• had been flaring
  perfect progressive

Future

• will flare
  simple
• will have flared
  perfect
• will be flaring
  progressive
• will have been flaring
  perfect progressive

Etymology

Origin of flare

1540–50; original meaning: spread out, said of hair, a ship's sides, etc.; compare Old English flǣre either of the spreading sides at the end of the nose

Explanation

A flare is a sudden burst of light. The flare of a lit match in the dark night is strangely beautiful. The flare of a flame in the dark is sudden and bright, and the flare of an idea or emotion is similarly intense. Parts of clothing that grow wider, like the "bells" on your bell-bottoms — and are also called flares. The verb flare also means to burn brightly or suddenly erupt, like a skin rash that flares up in hot weather or your friend's temper that flares when people tease her about her favorite team losing the big game.

Example Sentences

See Examples For:

flare flares flared flaring

But Apple’s “go-slow” strategy comes in handy on days when investor concerns about AI overspending flare up, insulating the stock from downturns that hit the semiconductor space.

From MarketWatch ● Aug. 19, 2026

That blaze broke out when a couple lit a flare during a pre-wedding photo shoot and destroyed more than 500 hectares of land.

From Barron's ● Aug. 7, 2026

"Once there's enough energy wound up in the higher layers, it can then be released, as a flare or what's known as a coronal mass ejection," he said.

From BBC ● Aug. 5, 2026

Simon’s powers flare up uncontrollably when he’s beset by anxiety and self-doubt.

From Los Angeles Times ● Aug. 3, 2026

Usually it was fine, he said, but it could flare up fast since the pressure wasn’t steady.

From "Out of Darkness" by Ashley Hope Pérez

In some cases, you can even find vehicle-inspired first-aid kits that include items such as emergency blankets, flashlights, road flares, emergency markers, and more.

From MarketWatch ● Aug. 20, 2026

“Ever since, we’ve been crossing our fingers and knocking on wood and sending up flares to the Booker gods, and sent the book to the printer a little earlier than usual just in case.”

From Los Angeles Times ● Aug. 19, 2026

The new AI system was designed to search for the same types of flares across the entire sky, including locations far from galactic centers.

From Science Daily ● Aug. 6, 2026

This releases flares that train the immune system to track down and kill cancer cells hiding around the body.

From The Wall Street Journal ● Jul. 31, 2026

Streaks of fire that made him think of sun flares.

From "The Kill Order (Maze Runner, Book Four; Origin)" by James Dashner

Higher gasoline prices as hostilities in the Middle East flared up were the biggest driver of cost pressures, though households also paid more in travel costs, due to a tailwind from the soccer World Cup.

From The Wall Street Journal ● Aug. 17, 2026

"Yesterday morning it was as calm as it is now, and then it all flared up again in the afternoon," Cereja warned.

From Barron's ● Jul. 30, 2026

Ohtani hasn’t pitched in a game since that July 3 start, when the biceps issue flared in his last at-bat.

From Los Angeles Times ● Jul. 30, 2026

Tension flared ‌in the 40th minute when two ‌opposing players confronted each other after a shirt-tugging incident, with other players rushed to join in the confrontation.

From BBC ● Jul. 26, 2026

The Story Box flared white-hot in the dark before it faded to a dull glow, and a sigh seemed to settle throughout the hull of the ancient ship.

From "Tristan Strong Punches a Hole in the Sky" by Kwame Mbalia

Reaching the semi-finals came at a price, though, with his arm injury flaring up again at Wimbledon and leaving Draper "devastated" at having to pull out of his home Grand Slam.

From BBC ● Jul. 27, 2026

To separate the true signals from the effects of stellar flaring, the team developed specialized calibration methods.

From Science Daily ● Jul. 15, 2026

Skepticism surrounding high levels of AI spending are also flaring up again, Reynolds noted.

From MarketWatch ● Jul. 7, 2026

Cost-of-living concerns, brought on by the flaring up of inflation since the pandemic, have led more union workers to the picket line.

From The Wall Street Journal ● Jun. 10, 2026

A campfire flaring up into the night sky.

From "The Darkest Minds" by Alexandra Bracken

Related Words

• blaze
• boil over
• break out
• burn
• explode
• flash
• flicker
• glow
• seethe