warrant
/ˈwɒɹənt//ˈwɑɹənt/noun
Definitions
Authorization or certification; a sanction, as given by a superior.
Something that provides assurance or confirmation; a guarantee or proof.
Example: a warrant of authenticity; a warrant for success
An order that serves as authorization; especially a voucher authorizing payment or receipt of money.
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.
verb
Definitions
To protect, keep safe (from danger).
To give (someone) an assurance or guarantee (of something); also, with a double object: to guarantee (someone something).
To guarantee (something) to be (of a specified quality, value, etc.).
To guarantee as being true; (colloquially) to believe strongly.
Example: That tree is going to fall, I’ll warrant.