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National Weather Service an agency of the U.S. Department of Commerce that compiles data on weather conditions and issues weather warnings.
Nation of Islam an organization, mainly of U.S. blacks, that espouses the religious and ethical doctrines of Islam. (See Black Muslim.)
nation-state the modern autonomous nation, considered as a unit of political organization.
nationwide throughout or over the entire nation.
native being the place of birth or origin. [8 definitions]
Native American an American Indian. [2 definitions]
native-born connected to a specified place by birth.
nativism the practice that favors and preserves the interests of natives over those of more recent settlers.
nativity circumstances or place of being born; birth. [2 definitions]
NATO abbreviation of "North Atlantic Treaty Organization."
natty (informal) neat, well-groomed, and smartly dressed; dapper.
natural of, pertaining to, produced by, or existing in nature. [9 definitions]
natural-born citizen a person born in the United States or on foreign soil to two parents who are American citizens. Being a natural-born citizen is a requirement for becoming a U.S. president.
natural childbirth childbirth without anesthesia or surgical aid, for which the expectant mother often receives lengthy psychological and physical preparation.
natural disaster a disaster, such as an earthquake, flood, or volcanic eruption, that is caused by natural rather than human forces and which destroys life and property.
natural gas a mixture of hydrocarbon gases occurring naturally in the earth's crust, usu. with petroleum deposits, that is used chiefly for fuel.
natural history the study of botany, zoology, geology, and other sciences that deal with objects in nature or the physical world.
naturalism in literature, a method of depicting life that reflects a philosophy of determinism. [3 definitions]
naturalist a person who has expertise in or is devoted to the study of the natural sciences, esp. botany and zoology. [2 definitions]
naturalistic exhibiting or pertaining to naturalism. [2 definitions]
naturalization the act, on the part of a government, of granting full citizenship to a foreign-born person. [2 definitions]