To lessen, diminish, abridge (a privilege, right, etc.). Obsolete.

To deprive of efficacy, force, or value; to render inoperative or meaningless; to set aside or nullify. Now rare.

To make void or of no effect; to refute, disprove. In Law, to defeat (a pleading); to invalidate, ‘quash’ (a sentence, agreement, document, etc.)

transitive. To put an end to, do away with (an institution, custom, or practice); to eradicate, destroy (something prevalent); to annul or make…

transitive. To bring to nothing, do away with, destroy.

transitive. To cancel, repeal, or annul (a law, decision, agreement, etc.); to invalidate; to make null and void; to abolish. Now rare.

transitive. To annul, revoke, or abolish (a law, treaty, right, etc.); to render null and void or of no effect; to invalidate.

To make void, annul, deprive of force or validity. Chiefly in religious and legal phraseology. (The earliest recorded sense in English.) Obsolete.

transitive. Law. To annul (an agreement, decision, etc.); to make void.

To put an end to, make void (a law, legal right, status, ordinance). Also, to cancel (a licence, the claim of a creditor). Cf. extinguish, v. 3b.

transitive. To make or pronounce of no force or validity. Obsolete.

To render void (a bill, claim, right, etc.). In Law sometimes spec. (see extinguishment, n. 3b).

To dissolve, nullify. rare.

To make void, frustrate, defeat, disappoint.

transitive. To make void or of no effect; to deprive of force, usefulness, etc.

To make void, annul, do away with. Obsolete.

To render void or of none effect. rare.

To make of no effect. nonce-use. Cf. shorten, v. 3b.

transitive. To make of no effect; to render void, nugatory, or useless; to annul; to override; to take precedence over.

To render of no effect; to invalidate either completely or in part; spec. to destroy or impair the legal effect or force of (a deed, etc.).

transitive. To render invalid; to destroy the validity or strength of (an argument, contract, etc.); to render of no force or effect; esp. to…

transitive. To extinguish, blot out, abolish. to out pipes (Nautical): to cease smoking pipes.

transferred. To deprive of force, efficacy, or value; to render inoperative, meaningless, or useless. Now Obsolete or rare.

transitive. = exinanite, v.

To set aside, invalidate.

To quash; to suppress or put down; to undo or destroy in a complete or summary manner.

transitive. To render invalid; to invalidate.

transitive. To render ineffective or invalid, to nullify, cancel out; to destroy. Also (esp. in early use): to deny the existence or truth of; to…

transitive. To render ineffective; to neutralize; to cancel out.

(un-, prefix2 affix 1b.)

gen. with off. (Cf. cut off at off, adv. 4a.)