Definify.com
Webster 1913 Edition
Invalidate
In-val′i-date
,Verb.
T.
[
imp. & p. p.
Invalidated
; p. pr. & vb. n.
Invalidating
.] [From
Invalid
null.] To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow;
as, to
. invalidate
an agreement or argumentWebster 1828 Edition
Invalidate
INVAL'IDATE
,Verb.
T.
1.
To weaken or lessen the force of; more generally, to destroy the strength or validity of; to render of no force or effect; as, to invalidate an agreement or a contract.2.
To overthrow; to prove to be of no force; as, to invalidate an argument.