1. (n.)warrant authorization, sanction, or justification.
2. warrant something that serves to give formal assurance of something; a guarantee.
3. warrant something regarded as offering a guarantee or positive assurance of a thing: The cavalry and artillery were sure warrants of success.
4. warrant a document certifying or authorizing something, as a receipt or license.
5. warrant Law. an instrument authorizing an officer to make an arrest, search or seize property, etc.
6. warrant the certificate of authority issued to an officer of the armed forces immediately below the rank of a commissioned officer.
7. warrant a written authorization for the payment or receipt of money.
8. (v.t.)warrant to authorize.
9. warrant to give reason or sanction for; justify: Circumstances warrant such measures.
10. warrant to vouch for (often used with a clause) : I'll warrant he did!
11. warrant to give a formal assurance to or for; guarantee: to warrant payment.
12. warrant to guarantee the quantity, quality, and other representations of (a product), as to a purchaser.
13. warrant to assure indemnification against loss to.
14. warrant Law. to guarantee title of property to (a grantee).
Etymology: (1175–1225; ME warant < AF; OF guarant < Gmc; cf. MLG warend, -ent warranty, n. use of prp. of waren to warrant; cf. guaranty)
Definition of 'warrant'
Princeton's WordNet
1. (noun)warrant a writ from a court commanding police to perform specified acts
2. (noun)warrant, stock warrant, stock-purchase warrant a type of security issued by a corporation (usually together with a bond or preferred stock) that gives the holder the right to purchase a certain amount of common stock at a stated price "as a sweetener they offered warrants along with the fixed-income securities"
3. (noun)sanction, countenance, endorsement, indorsement, warrant, imprimatur formal and explicit approval "a Democrat usually gets the union's endorsement"
4. (verb)guarantee, warrant, warrantee, warranty a written assurance that some product or service will be provided or will meet certain specifications
5. (verb)justify, warrant show to be reasonable or provide adequate ground for "The emergency does not warrant all of us buying guns"; "The end justifies the means"
6. (verb)guarantee, warrant stand behind and guarantee the quality, accuracy, or condition of "The dealer warrants all the cars he sells"; "I warrant this information"
1. (noun)warrant a legal document giving permission to search private property You can't come in without a warrant.
Definition of 'warrant'
Webster Dictionary
1. (noun)warrant that which warrants or authorizes; a commission giving authority, or justifying the doing of anything; an act, instrument, or obligation, by which one person authorizes another to do something which he has not otherwise a right to do; an act or instrument investing one with a right or authority, and thus securing him from loss or damage; commission; authority
2. (noun)warrant a writing which authorizes a person to receive money or other thing
3. (noun)warrant a precept issued by a magistrate authorizing an officer to make an arrest, a seizure, or a search, or do other acts incident to the administration of justice
4. (noun)warrant an official certificate of appointment issued to an officer of lower rank than a commissioned officer. See Warrant officer, below
5. (noun)warrant that which vouches or insures for anything; guaranty; security
6. (noun)warrant that which attests or proves; a voucher
7. (noun)warrant right; legality; allowance
8. (noun)warrant to make secure; to give assurance against harm; to guarantee safety to; to give authority or power to do, or forbear to do, anything by which the person authorized is secured, or saved harmless, from any loss or damage by his action
9. (noun)warrant to support by authority or proof; to justify; to maintain; to sanction; as, reason warrants it
10. (noun)warrant to give a warrant or warranty to; to assure as if by giving a warrant to
11. (noun)warrant to secure to, as a grantee, an estate granted; to assure
12. (noun)warrant to secure to, as a purchaser of goods, the title to the same; to indemnify against loss
13. (noun)warrant to secure to, as a purchaser, the quality or quantity of the goods sold, as represented. See Warranty, n., 2
14. (noun)warrant to assure, as a thing sold, to the purchaser; that is, to engage that the thing is what it appears, or is represented, to be, which implies a covenant to make good any defect or loss incurred by it
Definitions of warrant 
Afrikaans: verskoon
Arabic: يُبَرِّر، يُجيز
Bulgarian: основание
Brazilian: justificar
Czech: ospravedlnit
German: rechtfertigen
Danish: berettige
Greek: δικαιολογώ, δίνω το δικαί
Spanish: justificar
Estonian: õigustama
Farsi: حكم كتبي
Finnish: oikeuttaa
French: justifier
Hebrew: לְהַצדִיק
Hindi: औचित्य
Croatian: nalog
Hungarian: indokol
Indonesian: memberi pembenaran, mengh
Icelandic: réttlæta
Italian: giustificare
Japanese: 正当化する
Korean: 정당화하다
Lithuanian: pateisinti
Latvian: attaisnot
Malay: mewajarkan
Dutch: rechtvaardigen
Norwegian: gi rett til, berettige ti
Polish: usprawiedliwiać
Portuguese: justificar
Romanian: a justifica
Russian: оправдывать
Slovak: ospravedlniť
Slovenian: upravičiti
Serbian: opravdati
Swedish: berättiga, rättfärdiga
Thai: ให้เหตุผล; รับรอง; รับประ
Turkish: haklı kılmak, hak kazandı
Taiwanese: 足以成為…理由，合理化
Ukrainian: виправдовувати
Urdu: وجہ جواز ہونا
Vietnamese: biện hộ
Chinese: （做某事的）正当理由，成为...的根据
