The archaism for oar (which see). A measure of land in France containing 100 square metres.
āre, v. arefacio. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
·noun The unit of superficial measure, being a square of which each side is ten meters in length; 10...
Webster's Dictionary of the English Language
out of doors. Lane. ...
A glossary of provincial and local words used in England by Francis Grose