• noun a unit of measurement of land area, equal to 4840 square yards or 0.4047 hectares
  • acronym forAdvisory Committee on Releases to the Environment
    (written as ACRE)


  • noun a measure of the area of land (= 0.45 hectares)


  • A common unit of land-area measurement equal to 160 square rods, or 43,560 square feet.

Real Estate

  • noun a unit of area used in some countries, including the United States and the United Kingdom, equal to 4,046.86 sq m./4,840 sq yd


  • noun the buttock(s). In this sense the word is common in Australia, normally in the singular form.
  • noun the testicle(s). Usually in the plural, this sense of the word is typically used by British schoolboys.

Origin & History of “acre”

Acre is a word of ancient ancestry, going back probably to the Indo-European base *ag-, source of words such as agent and act. This base had a range of meanings covering ‘do’ and ‘drive’, and it is possible that the notion of driving contributed to the concept of driving animals on to land for pasture. However that may be, it gave rise to a group of words in Indo-European languages, including Latin ager (whence English agriculture), Greek agros, Sanskrit ájras, and a hypothetical Germanic *akraz. By this time, people’s agricultural activities had moved on from herding animals in open country to tilling the soil in enclosed areas, and all of this group of words meant specifically ‘field’. From the Germanic form developed Old English æcer, which as early as 1000 ad had come to be used for referring to a particular measured area of agricultural land (as much as a pair of oxen could plough in one day).