Definition of sinfonia concertante in English:

noun

• A piece of music for orchestra with one or (usually) more soloists, typically from the 18th century.

  ‘Accurately described by composer/critic Kaikosru Sorabji as more of a ‘sinfonia concertante than a concerto in its proper sense,’ this is how it was performed by both orchestra and pianist.’

  ‘Again, according to Klöcker, these ten sinfonias concertantes are not intended to be representative of the genre.’