DEFEASANCE
Etymology
Noun
defeasance (countable and uncountable, plural defeasances)
(now rare) Destruction, defeat, overthrow.
(US, legal) The rendering void of a contract or deed; an annulment or abrogation.
Verb
defeasance (third-person singular simple present defeasances, present participle defeasancing, simple past and past participle defeasanced)
(US, legal, transitive) To void; to annul.
Source: Wiktionary
De*fea"sance, n. Etym: [OF. defesance, fr. defesant, F. défaisant, p.
pr. of defaire, F. défaire, to undo. See Defeat.]
1. A defeat; an overthrow. [Obs.]
After his foes' defeasance. Spenser.
2. A rendering null or void.
3. (Law)
Definition: A condition, relating to a deed, which being performed, the
deed is defeated or rendered void; or a collateral deed, made at the
same time with a feoffment, or other conveyance, containing
conditions, on the performance of which the estate then created may
be defeated.
Note: Mortgages were usually made in this manner in former times, but
the modern practice is to include the conveyance and the defeasance
in the same deed.
Source: Webster’s Unabridged Dictionary 1913 Edition