adagio

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adverb & adjective In a slow tempo, usually considered to be slower than andante but faster than larghetto. Used chiefly as a direction.
• noun Music A slow passage, movement, or work, especially one using adagio as the direction.
• noun A section of a pas de deux in which the ballerina and her partner perform steps requiring lyricism and great skill in lifting, balancing, and turning.
• noun A succession of slow, fluid movements performed as an exercise in ballet.

from The Century Dictionary.

• Special varieties of movement or style are indicated by adding other terms, as: adagio assai or molto, very slow; adagio non troppo, slow, but not too much so; adagio cantabile or sostenuto, slow, with a flowing or sustained movement; adagio patetico, slow and with pathos; adagio pesante, slow, with heavy accents; adagio religioso, slow and in the church style; etc.
• noun In music:
• Slow; slowly, leisurely, and with grace. When repeated, adagio, adagio, it directs the performance to be very slow.
• Slow: as, an adagio movement.
• noun A slow movement; also, a piece of music or part of a composition characterized by slow movement.

from the GNU version of the Collaborative International Dictionary of English.

• (Mus.) Slow; slowly, leisurely, and gracefully. When repeated, adagio, adagio, it directs the movement to be very slow.
• noun A piece of music in adagio time; a slow movement.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun music A tempo mark directing that a passage is to be played rather slowly, leisurely and gracefully.
• noun music A passage having this mark.
• noun dance A male-female duet or mixed trio ballet displaying demanding balance, spins and/or lifts.
• adverb music Played rather slowly.
• adjective music Describing a passage having this mark.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adverb slowly
• adjective (of tempo) leisurely
• noun (music) a composition played in adagio tempo (slowly and gracefully)
• noun a slow section of a pas de deux requiring great skill and strength by the dancers