Meaning of fastness in English

  1. Pronunciation

    /ˈfæs(t)nəs/

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  1. Noun

    fastness

    Etymology

    Old English fæstnes(see fast, -ness)

    Definitions

    1. a rate (usually rapid) at which something happens

    Examples

    • « the project advanced with gratifying speed »
  2. 2. the quality of being fixed in place
  3. 3. a strongly fortified defensive structure