NATURAL - A musical symbol used to cancel a previous sharp or flat.
NEOCLASSICAL - A return by twentieth century composers to musical forms used during the Classical era.
NOCTURNE - French for "at night." A term which was first applied to lyric pieces of the 18th century. Nocturne's rose to popularity in the 19th century.
NON TROPPO - Not too much.
NOTATION - A system of expressing musical sounds with written symbols.
NOTE - A musical sound or written symbol.