1.abbr.av. or avdp. Avoirdupois weight. 2.Informal Weight or heaviness, especially of a person.
ETYMOLOGY:
Middle English avoir de pois, commodities sold by weight, alteration of Old French aveir de peis, goods of weight : aveir, avoir, to have (from Latin habre; see able) + de, of (from Latin d, from; see de) + peis, pois, weight (from Vulgar Latin *psum, from Latin pnsum, past participle of pendere, to hang; see (s)pen- in Appendix I).