- warrant [wôr′ənt, wär′ənt]n.[ME warant < NormFr (OFr garant), a warrant < Frank * warand < prp. of * warjan; akin to OE werian, to guard, defend: see WEIR]1.a) authorization or sanction, as by a superior or the lawb) justification or reasonable grounds for some act, course, statement, or belief2. something that serves as an assurance, or guarantee, of some event or result3. a writing serving as authorization or certification for something; specif.,a) authorization in writing for the payment or receipt of moneyb) a short-term note issued by a municipality or other governmental agency, usually in anticipation of tax revenuesc) an option issued by a company granting the holder the right to buy certain securities, generally common stock, at a specified price and usually for a limited timed) Law a writ or order authorizing an officer to make an arrest, seizure, or search, or perform some other designated acte) Mil. the certificate of appointment to the grade of warrant officer: cf. WARRANT OFFICERvt.1.a) to give (someone) authorization or sanction to do somethingb) to authorize (the doing of something)2. to serve as justification or reasonable grounds for (an act, belief, etc.) [a remark that did not warrant such anger]3. to give formal assurance, or guarantee, to (someone) or for (something); specif.,a) to guarantee the quality, quantity, condition, etc. of (goods) to the purchaserb) to guarantee to (the purchaser) that goods sold are as representedc) to guarantee to (the purchaser) the title of goods purchased; assure of indemnification against lossd) Law to guarantee the title of granted property to (the grantee)4. Informal to state with confidence; affirm emphatically [I warrant they'll be late]SYN.- ASSERTwarrantableadj.
English World dictionary. V. Neufeldt. 2014.