Also spelled fas

US /fæst/ UK /fɑːst/
adv adj Freq #613

Meanings

  1. 1
    adj

    Moving or able to move quickly.

    He drives a very fast car.

  2. 2
    adv

    Quickly; at high speed.

    How fast can they get here?

  3. 3
    adv

    Firmly or tightly in place.

    She held fast to the rope as the boat rocked.

  4. 4
    adj

    Showing a time that is ahead of the correct time.

    My watch is five minutes fast.

Thesaurus

Synonyms
3 adv · firmly or tightly in place. tight
Opposites
Word family
Forms fastedfasterfastestfastingfastsunfast
Derived forms acid-fastbarefastbedfastbreakfastbreastfastcragfastearthfastenfastenfail-fastfast-actingfast-fashionfast-flowing

Common collocations

Etymology

From Middle English fasten, from Old English fæstan (“to fast”), from Proto-West Germanic *fastēn, from Proto-Germanic *fastāną (“to fast”), from the same root as Proto-Germanic *fastijaną (“to fasten”), derived from *fastuz, and thereby related to Etymology 1. The religious sense is presumably introduced in the Gothic church, from Gothic 𐍆𐌰𐍃𐍄𐌰𐌽 (fastan, “hold fast (viz. to the rule of abstinence)”). This semantic development is unique to Gothic, the term glosses Greek νηστεύω (nēsteúō), Latin ieiuno which do not have similar connotations of "holding fast". The feminine noun Old High German fa…

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