1. (

• guarantee ,
• warrant ,
• warrantee ,
• warranty

) a written assurance that some product or service will be provided or will meet certain specifications ;

2. (

• guarantee ,

) an unconditional commitment that something will happen or that something is true; "there is no guarantee that they are not lying" ;

3. (

• guarantee ,
• guaranty

) a collateral agreement to answer for the debt of another in case that person defaults ;

1. (

• guarantee ,
• vouch ,

) give surety or assume responsibility; "I vouch for the quality of my products" ;

2. (

• guarantee ,
• ensure ,
• insure ,
• assure ,
• secure

) make certain of; "This nest egg will ensure a nice retirement for us"; "Preparation will guarantee success!" ;

3. (

• undertake ,
• guarantee ,

) promise to do or accomplish; "guarantee to free the prisoners" ;

4. (

• guarantee ,
• warrant ,

) stand behind and guarantee the quality, accuracy, or condition of; "The dealer warrants all the cars he sells"; "I warrant this information" ;