1. Of, relating to, or resulting from industry: industrial development; industrial pollution.
2. Having highly developed industries: an industrial nation.
3. Employed, required, or used in industry: industrial workers; industrial diamonds.

1. A firm engaged in industry.
2. A stock or bond issued by an industrial enterprise.
3. A person employed in industry.
4. A style of rock music marked by harsh rhythms, little melody, and nihilistic lyrics.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.