Concerto \Con*cer"to\ (?; It. ?), n.; pl. {Concertos}. [It. See
{Concert}, n.] (Mus.)
A composition (usually in symphonic form with three
movements) in which one instrument (or two or three) stands
out in bold relief against the orchestra, or accompaniment,
so as to display its qualities or the performer's skill.
[1913 Webster] Concert of Europe