Definition of "underbrush" []

• Small trees, shrubs, or similar plants growing beneath the taller trees in a forest. (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.

• "Back early part of December, you've had House and Senate staff starting to meet Democratic staff, starting to thrash out what they call the underbrush -- sort of the easier parts of these Bills where most of the things were the same."
• "It knocked down so many trees that the underbrush is now so thick you can hardly get in the woods."
• "In a bee-line, through the underbrush, which is peculiarly dense, very thorny, and very aggressive in that locality, a full half hour was necessary."