from
The Collaborative International Dictionary of English v.0.48
Nullify \Nul"li*fy\, v. t. [imp. & p. p. {Nullified}; p. pr. &
vb. n. {Nullifying}.] [L. nullificare; nullus none + -ficare
(in comp.) to make. See {Null}, a., and {-fy}.]
To make void; to render invalid; to deprive of legal force or
efficacy.
[1913 Webster]
Such correspondence would at once nullify the
conditions of the probationary system. --I. Taylor.
[1913 Webster]
Syn: To abrogate; revoke; annul; repeal; invalidate; cancel.
See {Abolish}.
[1913 Webster]