| flap |
roll: move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach" move noisily; "flags flapped in the strong wind" any broad thin and limber covering attached at one edge; hangs loose or projects freely; "he wrote on the flap of the envelope" beat: move with a thrashing motion; "The bird flapped its wings"; "The eagle beat its wings and soared high into the sky" dither: an excited state of agitation; "he was in a dither"; "there was a terrible flap about the theft" the motion made by flapping up and down beat: move with a flapping motion; "The bird's wings were flapping" dither: make a fuss; be agitated a movable piece of tissue partly connected to the body pronounce with a flap, of alveolar sounds a movable airfoil that is part of an aircraft wing; used to increase lift or drag
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| flammable |
easily ignited
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| flare |
a shape that spreads outward; "the skirt had a wide flare" a sudden burst of flame a burst of light used to communicate or illuminate reddening of the skin spreading outward from a focus of infection or irritation a sudden recurrence or worsening of symptoms; "a colitis flare"; "infection can cause a lupus flare" solar flare: a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference am unwanted reflection in an optical system (or the fogging of an image that is caused by such a reflection) a sudden outburst of emotion; "she felt a flare of delight"; "she could not control her flare of rage" burn brightly; "Every star seemed to flare with new intensity" a device that produces a bright light for warning or illumination or identification flare out: become flared and widen, usually at one end; "The bellbottom pants flare out" flare pass: a short forward pass to a back who is running toward the sidelines; "he threw a flare to the fullback who was tackled for a loss" shine with a sudden light; "The night sky flared with the massive bombardment" (baseball) a fly ball hit a short distance into the outfield erupt: erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
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| flash |
a sudden intense burst of radiant energy a momentary brightness a short vivid experience; "a flash of emotion swept over him"; "the flashings of pain were a warning" gleam or glow intermittently; "The lights were flashing" appear briefly; "The headlines flashed on the screen" a sudden brilliant understanding; "he had a flash of intuition" blink of an eye: a very short time (as the time it takes the eye blink or the heart to beat); "if I had the chance I'd do it in a flash" flaunt: display proudly; act ostentatiously or pretentiously; "he showed off his new sports car" ostentation: a gaudy outward display make known or cause to appear with great speed; "The latest intelligence is flashed to all command posts" flare: a burst of light used to communicate or illuminate dart: run or move very quickly or hastily; "She dashed into the yard" expose or show briefly; "he flashed a $100 bill" news bulletin: a short news announcement concerning some on-going news story a bright patch of color used for decoration or identification; "red flashes adorned the airplane"; "a flash sewn on his sleeve indicated the unit he belonged to" protect by covering with a thin sheet of metal; "flash the roof" a lamp for providing momentary light to take a photograph emit a brief burst of light; "A shooting star flashed and was gone" brassy: tastelessly showy; "a flash car"; "a flashy ring"; "garish colors"; "a gaudy costume"; "loud sport shirts"; "a meretricious yet stylish book"; "tawdry ornaments"
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| flash point |
point at which something is ready to blow up the lowest temperature at which the vapor of a combustible liquid can be ignited in air
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