capable of being annulled or terminated.
Origin of defeasible
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
law (of an estate or interest in land) capable of being defeated or rendered void
philosophy (of a judgment, opinion, etc) having a presupposition in its favour but open to revision if countervailing evidence becomes knownCompare incorrigible (def. 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012