This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Informal An aircraft carrier.

n. Informal A short haircut in which the hair is brushed straight up and cropped flat across the top.

n. A short haircut in which the hair is brushed straight up then cut flat across the top

n. (informal) An aircraft carrier; origin credited since 1942 to a laconic message, “Scratch one flattop,” radioed by LCDR Robert E. Dixon to USS Lexington, whose commanding officer credited the pilot with coining the standard USN slang; see Wikipedia for Battle of Coral Sea

n. An aircraft carrier.

n. An American perennial herb, Vernonia Noveboracensis. Also called iron-weed.

n. a large warship that carries planes and has a long flat deck for takeoffs and landings

n. a closely cropped haircut; usually for men

"First some background from Jim Comish, executive director of AMSE: The museum has just opened a new exhibit featuring an original B-1 model house, known as a flattop because of its flat, tar roof."

war vessel    warship    combat ship    haircut   

sticky-up    pageboy    punk-rock    pink-tipped    punky    gamine    rolltop    moments    air    military-style