IPA: //sɪnˈfoʊniə//
KK: /sɪnˈfoʊniə/
A type of musical composition that is usually large and written for an orchestra, often serving as an introduction to a larger work.
The orchestra performed a beautiful sinfonia before the opera began.
Sinfonia is derived from the Greek word "symphonia" (meaning agreement or concord), which is composed of "syn-" (meaning together) and "phone" (meaning sound). The term originally referred to a harmonious sound or agreement in music, thus evolving into the modern term for a musical composition.
Think of 'sounds together' — 'syn-' means together and 'phone' means sound. This helps you remember that 'sinfonia' refers to a harmonious musical composition.