Any of various shrubs or bushes having thorns or spines.(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.
Use "thornbush" in a sentence
"I felt like the place was telling me to go to a thornbush, so I went and sat under it."
"As they floated after Tally, scraping past girders and jagged chunks of concrete, Aya and Frizz collected scratches like they were crawling through a thornbush."
"He rolled, bouncing from one outcrop to the next, until he managed to fling out an arm and grab on to a scrubby thornbush."