adjective.
not liable to being annulled or declared void.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
not liable to being annulled or voided or undone
Word Usage
"If seisin corporeal, user immemorial, and prescription for levance and couchance conferred any title indefeasible, then were the rabbits the owners in fee-simple, absolute, paramount, and source of pedigree."