v. To change the status of land from that of a forest to ordinary land
the GNU version of the Collaborative International Dictionary of English
v. To reduce from the privileges of a forest to the state of common ground; to exempt from forest laws.
The Century Dictionary and Cyclopedia
In England, to free from the restrictions of forest laws; reduce from the legal state of a forest to that of common land.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. remove the trees from
Word Usage
"Lindsay therefore wrote to the king to try to "disafforest" the lands which were contiguous to the monastery, and he effected his object by payment of 1320 marks."