1) Area unit 2) French land measure 3) Square measure 4) Unit of area 
An arpent (aʁpɑ̃) is a unit of length and a unit of area. It is a pre-metric French unit based on the Roman actus. It is used in Quebec as well as in some areas of the United States that were part of French Louisiana. ==Definition== ===Unit of length=== There were various standard arpents. The most common ones were of 180 French feet, used in F...
unit of land area slightly smaller than an acre
• (n.) Alt. of Arpen
Ancient Measurement Terms: A measure of land roughly equal to a modern acre.
An arpent was a measure equal to 100 square perches.
[n] - a former French unit of area
noun a former French unit of area; equal approximately to an acre
an old French unit of area equal to about one acre (0.4 hectare). It is still used in the province of Quebec and in parts of Louisiana.