Definition of retarder in US English:



  • See retard

    • ‘Contractors are also encouraged to use evaporation retarders when weather conditions could cause excessive water evaporation from the slab.’
    • ‘Insecticidal boric acid is a low toxicity insecticide and fire retarder used in other insulation materials.’
    • ‘Also, since air retarders and vapor diffusion retarders serve different functions and have distinct characteristics, it may be more practical to install them as separate systems.’
    • ‘A vapor retarder in this location would reduce the amount of moisture that diffuses into the wall cavity.’
    • ‘The drivers are taught to use engine retarders instead of brakes, and if they have to use the brakes, to tap them lightly.’