Nullify vs Invalidate - What's the difference?

As verbs the difference between nullify and invalidate

is that nullify is (legal) to make legally invalid while invalidate is to make invalid especially applied to contract law.

(legal) to make legally invalid.

The contract has been nullified .

to prevent from happening

* (to make legally invalid) annul, cancel

(en-verb)

To make invalid. Especially applied to contract law.

The circuit court judge's ruling was invalidated by a superior judge.

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