com·mer·cial (k?-mûr?sh?l)adj.1. a. Of or relating to commerce: a commercial loan; a commercial attaché.b. Engaged in commerce: a commercial trucker.2. Relating to or being goods that are produced and distributed in large quantities.3. a. Having profit as a chief aim: a commercial publisher.b. Intended for or appealing to a large audience: commercial art.4. Sponsored by an advertiser or paid for by advertising: commercial television.n. An advertisement in audio or video form.com·mer?cial·ly adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.