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fast - definition and synonyms


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adverb fast pronunciation in American English /fæst/
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  1. 1

    We drove as fast as we could to the hospital.

    I can’t run very fast.

    Can’t you work any faster?

    Synonyms and related words
    1. a.
      over a short period of time

      The business has grown very fast.

      fast becoming/developing/disappearing etc.:

      This company is fast becoming a major exporter of computer software.

      Synonyms and related words
    2. b.
      without waiting or delaying

      You need to get help fast!

      We got there as fast as we could.

  2. 2
    firmly and strongly or tightly

    She held fast to the chair and refused to move.

    The van was stuck fast in the mud.

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

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