avoirdupois weight avoir·du·pois·weight uncommon noun 1. a system of weights based on the 16-ounce pound (or 7,000 grains) Synonymsavoirdupoisavoirdupois weight Related words Broader terms system of weights Part of avoirdupois unit WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
