Definitions of guarantee:

  • noun:   a written assurance that some product or service will be provided or will meet certain specifications
  • noun:   a pledge that something will happen or that something is true
    Example: "There is no guarantee that they are not lying"
  • noun:   a collateral agreement to answer for the debt of another in case that person defaults
  • verb:   give surety or assume responsibility
  • verb:   make certain of
    Example: "Preparation will guarantee success!"
  • verb:   stand behind and guarantee the quality, accuracy, or condition of
  • verb:   promise to do or accomplish
    Example: "Guarantee to free the prisoners"