acre
Cross references: 1. measure acre \'a--k*r\ n [ME, fr. OEcer; akin to OHG ackar field, L ager, Gk ag]ros, L agere to drive - more at AGENT 1a: archaic : a field esp. of arable or pasture land 1b: pl : LANDS, ESTATE 2: any of various units of area; esp : a unit in the U.S. and Engla nd equal to 160 square rods 3: a broad expanse or great quantity