Flare

Origin unknown.

Full definition of flare

(plural flares)

A source of brightly burning light or intense heat used to attract attention in an emergency, to illuminate an area, or as a decoy.

2010, James Fleming, Cold Blood...when the soldiers openly laughed at him, I knew he was in the bag. While he was putting on the snowplough, the Whites shot up a flare to see what was happening.
1918, W. B. Maxwell, The Mirror and the Lamp Chapter 7, The turmoil went on—no rest, no peace. â€¦ It was nearly eleven o'clock now, and he strolled out again. In the little fair created by the costers' barrows the evening only seemed beginning; and the naphtha flares made one's eyes ache, the men's voices grated harshly, and the girls' faces saddened one.

The flares steered the traffic away from the accident.
A spent flare had punctured the tire.
The flares attracted the heat-seeking missiles.
A widening of an object with an otherwise roughly constant width.

2003, Timothy Noakes, Lore of Running, page 270:The flare on the inside of the shoe resists ankle pronation;

That's a genuine early '70's flare on those pants.
(aviation) The transition from downward flight to level flight just before landing.
The captain executed the flare perfectly, and we lightly touched down.
(baseball) A low fly ball that is hit in the region between the infielders and the outfielders
Jones hits a little flare to left that falls for a single.
A type of pyrotechnic that produces a brilliant light or intense heat without an explosion. A colored flare used as a warning on the railroad, a fusee.

(intransitive) To blaze brightly.The blast furnace flared in the night.
(intransitive) To burn unsteadily.The candle flared in a sudden draught.
(transitive, intransitive) To open outward in shape.The cat flared its nostrils while sniffing at the air.The cat's nostrils flared when it sniffed at the air.The building flared from the third through the seventh floors to occupy the airspace over the entrance plaza.The sides of a bowl flare.
(transitive) To cause to burn.
To shine out with a sudden and unsteady light; to emit a dazzling or painfully bright light.
To shine out with gaudy colours; to be offensively bright or showy.