barred spiral galaxybarred spiral galaxyNGC 1300barred spiral galaxyn. A spiral galaxy whose inner spiral arms do not extend all the way to its center, but are connected with a bar-shaped structure that spans the galaxy center.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.