¿Qué es una sinfonía?
Una sinfonía es una composición musical interpretada por una gran orquesta de entre 50 y 80 instrumentos.  Los cuatro movimientos de una sinfonía son una apertura, un movimiento lento, un minueto y luego un allegro.  Las sinfonías no se refieren al músico, sino a la música que se interpreta armoniosamente.
What is a symphony?
A symphony is a musical composition that is played by a large orchestra that has anywhere between 50-80 instruments.  The four movements of a symphony are an opening, a slow movement, a minuet, and then an allegro.  Symphonies do not refer to the musician but rather the music that is being played harmoniously.