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Children's Dictionary
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foul line either of the lines on a baseball field drawn from home plate through first and third bases to the outfield. Foul lines mark the area within which fair play takes place. [2 definitions]
foul up (informal) to make serious mistakes, or cause someone else to do so.
found1 past tense and past participle of "find."
found2 to set up or create; establish.
foundation the basis of something such as an action, substance, structure, or opinion. [4 definitions]
founder1 a person who establishes something new and important, such as an institution, religion, or nation.
foundry a place where metal is formed into different objects.
fountain a spray of water created by a machine, or the structure from which the water flows. [2 definitions]
fountain pen a pen that holds a small supply of ink, which is drawn to the pen's point.
four the word for the Arabic numeral 4 and the Roman numeral IV. [3 definitions]
Four-H club an organization in the U.S. that teaches young people about farming and how to take care of a home. Four-H clubs are so named because they are meant to improve the heads, hearts, hands, and health of their members.
foursquare having four equal sides that meet in four right angles; square. [4 definitions]
fourteen the word for the Arabic numeral 14 and for the Roman numeral XIV. [3 definitions]
fourteenth coming next after the thirteenth in a series. [3 definitions]
fourth coming next after the third in a series. [3 definitions]
Fourth of July Independence Day in the United States.
fowl a bird such as a chicken that is raised for its eggs or meat. Ducks, geese, and turkeys are also domestic fowl. [2 definitions]
fox a wild mammal that has a pointed nose, pointed ears, and a bushy tail. Foxes are closely related to coyotes, dogs, and wolves. Foxes hunt insects, birds, and other small animals but will sometimes eat plants, especially fruit. [3 definitions]
foxhound a breed of dog. Foxhounds are dogs of medium size with short hair and are bred and trained to hunt foxes.
fraction a part or very small part of a whole. [2 definitions]
fracture a break or crack. [3 definitions]