An animal, such as a donkey, ox, or elephant, used for transporting loads or doing other heavy work.(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 "beast of burden" in a sentence
"On each of these stood a yachi-the chief beast of burden on New Lemuria, suggestive of a giant kangaroo, though with a larger head and a blue pelt."