simple past tense and past participle of nullify

That has been declared null / (computing) Whose value has been set to null

present participle of nullify

The act or process by which something is nullified.

plural of nullifier

One who, or that which, nullifies.

plural of nullifying

(transitive, law) To make legally invalid. / To prevent from happening. / To make of no use or value; to cancel out.

Third-person singular simple present indicative form of nullify

Able, or allowed to be nullified.