Also spelled fas
Meanings
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1
adj
Moving or able to move quickly.
He drives a very fast car.
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2
adv
Quickly; at high speed.
How fast can they get here?
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3
adv
Firmly or tightly in place.
She held fast to the rope as the boat rocked.
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4
adj
Showing a time that is ahead of the correct time.
My watch is five minutes fast.
Thesaurus
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…