- The official system of weights used in UK between 1856 and 1963. It had been the customary system in London since 1300.
- The official system of weights used in USA between 1866 and 1959.
- Weight; heaviness.
- he has a lot of avoirdupois
- 1915, Jack London, The Little Lady of the Big House
- It seems humanly reasonable that the three of us can woman-handle a mere man of your elderly and insulting avoirdupois.