WordWeb Online

1. Give surety or assume responsibility
   - vouch
    
2. Make certain in the future
   "Preparation will guarantee success!"
   - ensure, insure, assure, secure
    
3. Promise to do or accomplish
   "guarantee to free the prisoners"
   - undertake
    
4. Stand behind and guarantee the quality, accuracy, or condition of
   "The dealer guarantees all the cars he sells"
   - warrant

1. A written assurance that some product or service will be provided or will meet certain specifications
   - warrant, warrantee, warranty
    
2. An unconditional commitment that something will happen or that something is true
   "there is no guarantee that they are not lying"
    
3. A collateral agreement to answer for the debt of another in case that person defaults
   - guaranty

Derived forms: guarantees, guaranteeing, guaranteed

See also: guarantor

Type of: assurance, assure, back, collateral, endorse, indorse, pledge, plight, plump for, plunk for, promise, support

Encyclopedia: Guarantee