D defs.my
Entry 2 senses Webster, 1913

Composer

/kəm-pōzʹər/ · Com·pos·er · IPA /kəmˈpoʊzəɹ/
01 n. One who composes; an author. Specifically, an author of a piece of music.
  1. 1.
    One who composes; an author. Specifically, 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 (Encyc. of Mus.).
  2. 2.
    One who, or that which, quiets or calms; one who adjusts a difference.
    “Sweet composers of the pensive soul.” Gay.