One that composes, especially a person who composes music.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "composer" in a sentence
"For example, for a mail client which has one main window showing the mails and folders, and which can also have one or more windows for composing mails, the name for the folders window should be e.g. "mainwindow" and for the composer windows "composer#"."
"So, although there are nearly as many composers and sound designers working in theater as songwriters, to most directors, actors, and producers, the term composer means a person who writes musicals."
"I may not know much, but I think I know a little bit about compositional practice — studying to be a composer is a lot of investigating how the old masters got from point A to point B, or even how they got to point A in the first place — and I can say that any attempt to generalize the way great works have come into being is a fool's errand."