What does nullify mean?
Nullify means to make something ineffective, invalid, or without legal force. The word is especially associated with legal and official matters: a court may nullify a decision, a government may nullify a regulation, or an authority may cancel the effect of a contract or election result. In general use, it can mean to cancel the value or significance of something, as in nullifying the benefits of a product. The word has a formal, authoritative tone and is more precise than simply saying “cancel” when the intention is to remove validity or effect. Its Latin roots combine nullus, meaning “none” or “nothing,” with facere, “to make,” reflecting the idea of making something into nothing. Understanding nullify therefore involves recognizing both its legal function and its broader implication of completely removing an effect or power.
verbTo make something ineffective, invalid, or without legal force. It is especially used for laws, decisions, contracts, and official actions that are cancelled or rendered void.
- To make a law, decision, contract, agreement, or other official act ineffective or invalid.
- To cancel or erase the effect, value, or results of something.
- To render a person or position without authority or legal standing.
"The court ruled that the new regulation could not nullify the existing treaty."
"The constitutional court nullified the election results in the northern region."
"A successful appeal can nullify the earlier decision and return the case for reconsideration."
Nullify comes from the Latin idea of making something “nothing” — just as a null result has no effect, a nullified decision has no force.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nullify come from?
Nullify comes from Latin nullificare, formed from nullus (“none” or “nothing”) and facere (“to make”). The word entered English in the 17th century and originally referred to making something null or void. Its modern legal sense developed from this earlier meaning of reducing an act, agreement, or claim to no effect. Related English words include null, nullity, nullification, and nullifier.
Related word forms
How nullify is actually used
Nullify is formal and especially common in legal, constitutional, administrative, and financial contexts. It is usually transitive and implies that an existing act or effect is made void, rather than merely being ignored or delayed.
Easily confused with nullify
Nullify means to make something ineffective or invalid, whereas notify means to inform someone of news or information.