[acre] n [ME, fr. OE aecer; akin to OHG ackar field, L ager, Gk agros, and perh. to L agere to drive--more at agent] (bef. 12c) 1 a archaic: a field esp. of arable land or pastureland b pl: lands, estate
2: any of various units of area; specif: a unit in the U.S. and England equal to 43,560 square feet (4047 square meters)
3: a broad expanse or great quantity "~s of free publicity"