adverb & adjective.
In a moderately quick tempo, usually considered to be slightly slower than allegro but faster than andante. Used chiefly as a direction.
noun.
An allegretto passage or movement.
The Century Dictionary and Cyclopedia
In music, quicker in time than andante, but not so quick as allegro.
noun.
A movement in such time.
the GNU version of the Collaborative International Dictionary of English
adjective.
Quicker than andante, but not so quick as allegro.
adverb.
A direction in musical notation indicating that the musical piece should be played rather fast and lively.
noun.
A movement in this time.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
(of tempo) faster than allegro
adverb.
in a moderately quick tempo
noun.
a quicker tempo than andante but not as fast as allegro
noun.
a musical composition or musical passage to be performed at a somewhat quicker tempo than andante but not as fast as allegro
Word Usage
"Swiftness and clarity aside, one distinguishing feature was the limited use of string vibrato, now common practice but here especially effective in the seventh's allegretto, the not very slow "slow" movement."