DATE n. 2 definitions
or inscription was given, or executed, or made; as, the date of a letter, of a will, of a deed, of a coin. etc. And bonds without a date, they say, are void. Dryden.
DEFEASANCE n.
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.