Com-pōs'er, n.
n. 1. One who composes; an author; especially, an author of a piece of music.
If the thoughts of such authors have nothing in them, they at least . . . show an honest industry and a good intention in the composer. Addison.
His [Mozart's] most brilliant and solid glory is founded upon his talents as a composer. Moore.
Sense 2. One who quiets or calms; one who adjusts a difference. “Sweet composers of the pensive soul.” Gray.