noun. ['ˈʌndɝˌbrəʃ'] the brush (small trees and bushes and ferns etc.) growing beneath taller trees in a wood or forest.
1. Noun, singular or mass Wear work gloves, hard hat and sturdy boots to protect against scrapes from tree limbs and underbrush. 2. Adjective Watch your step when walking through underbrush and avoid reaching into holes or crevices in rocks.
