arrentation

from The Century Dictionary.

• noun In old English law, the action or privilege of arrenting; the giving of permission by the lord of the manor to the tenant of land in a forest to inclose it with a small ditch and low hedge, in consideration of a yearly rent. Also written arrendation.

from the GNU version of the Collaborative International Dictionary of English.

• (O. Eng. Law) A letting or renting, esp. a license to inclose land in a forest with a low hedge and a ditch, under a yearly rent.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun law, UK, obsolete A letting or renting, especially a licence to enclose land in a forest with a low hedge and ditch, under a yearly rent.