Informal Weight or heaviness, especially of a person.(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 "avoirdupois" in a sentence
"SAVE THE POUND (avoirdupois) If the word avoirdupois sounds a bit foreign too it is from French and Middle English (Anglo-French) avoir de pois, "goods of weight" or "goods sold by weight"."
"There are two series of weights in use among us; the one called avoirdupois, the other troy."
"Sorry, but I have lived with metric most of my life and converting to avoirdupois is too much of a pain for me."