A symphony is a long, complex piece of music written for a full orchestra. Think of it as a musical journey in multiple chapters, called movements, each with its own character and tempo. A typical symphony might open with a grand, energetic movement, shift to a slower, more emotional section, pick up energy again with a playful, dance-like movement, and finish with a powerful finale.

Symphonies emerged in the 1700s and became one of the most important forms of classical music. Composers like Mozart, Beethoven, and Brahms wrote symphonies that are still performed today in concert halls around the world. Beethoven's Fifth Symphony, with its famous “da-da-da-DUM” opening, might be the most recognizable symphony ever written.

Writing a symphony requires tremendous skill. The composer must create separate parts for dozens of instruments (violins, trumpets, flutes, drums, and many more) that sound beautiful both individually and when played together. A single symphony can take months or even years to compose and might last 30 to 60 minutes when performed.

The word can also describe harmony and cooperation, like when someone says different elements come together in a “symphony of flavors” or when a well-coordinated team works together in a “symphony of movement.”