To make invalid. Especially applied to contract law.
To make or declare (an argument, statement, or theory) unsound or erroneous; disprove.
To render invalid; discredit.
To authorize; to give (someone) sanction or warrant (to do something).
To justify; to give grounds for.
To guarantee (something) to be (of a specified quality, value, etc.).
To guarantee as being true; (colloquial) to believe strongly.
Authorization or certification; a sanction, as given by a superior.
A certificate of appointment given to a warrant officer.
A judicial writ authorizing an officer to make a search, seizure, or arrest, or to execute a judgment.
An option, usually issued together with another security and with a term at issue greater than a year, to buy other securities of the issuer.
Something that provides assurance or confirmation; a guarantee or proof.
Underclay in a coal mine.
A document certifying that a motor vehicle meets certain standards of mechanical soundness and safety; a warrant of fitness.
An order that serves as authorization; especially a voucher authorizing payment or receipt of money.