To place elements in deliberate relation — in time (a sequence), in space (a composition). The conductor's verb.

One who sets parts into a whole meant to be performed.

How parts are put together so the whole says more than they do. Also a made work — both are arrangement with intent.

The one after the fourth — and music's most consonant interval after the octave: seven semitones of agreement.

A work, especially one large enough to stand alone. From the Latin for labour — an opus is named for the effort in it.

To bring many players into one music — coordination that serves the whole without silencing any part.

A set of related things offered together. A suite is designed to be used as one, not merely sold as one.