01 n. A defeat; an overthrow.
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1.
A defeat; an overthrow.[Obs.]“After his foes' defeasance.” — Spenser.
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2.
A rendering null or void.
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3.
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.(Law)