absolute music
Music that is about the music itself (its melodies, rhythms and form) and does not tell a story or describe a scene.
program music
Instrumental music that tells a story, paints a scene or expresses an idea from outside the music.
symphony
A large piece for orchestra, usually in several movements.
monophonic
One melody alone, with no harmony.
homophonic
A melody with chords supporting it.
polyphonic
Two or more independent melodies at the same time.
minuet
A stately dance in 3/4 time, often used as a movement of a symphony.
ternary form
ABA form: a section, a contrasting section, then the first section again.