Definition of

Fast

  1. (noun, act) abstaining from food
  2. (verb, consumption) abstain from eating
  3. (verb, consumption) abstain from certain foods, as for religious or medical reasons
  4. (adj, all) (of a photographic lens or emulsion) causing a shortening of exposure time
  5. (adj, all) unwavering in devotion to friend or vow or cause
    loyal supporters
    the true-hearted soldier...of Tippecanoe
    fast friends
  6. (adj, all) acting or moving or capable of acting or moving quickly
    on the fast track in school
    set a fast pace
    a fast car
  7. (adj, all) at a rapid tempo
  8. (adj, all) (used of timepieces) indicating a time ahead of or later than the correct time
  9. (adj, all) securely fixed in place
  10. (adj, all) hurried and brief
    took a flying glance at the book
    a quick inspection
    a fast visit
  11. (adj, all) unrestrained by convention or morality
    deplorably dissipated and degraded
    riotous living
    fast women
  12. (adj, all) resistant to destruction or fading
  13. (adj, all) (of surfaces) conducive to rapid speeds
    grass courts are faster than clay
  14. (adv, all) quickly or rapidly (often used as a combining form)
    ran as fast as he could
    needs medical help fast
    fast-running rivers
    fast-breaking news
    fast-opening (or fast-closing) shutters
  15. (adv, all) firmly or closely
    her foot was stuck fast
    held tight

via WordNet, Princeton University

Antonyms of Fast

slow

Alternate forms of Fast

Derivations: fast, fasting, fastness

Hyponyms: diet, dieting, hunger strike, ramadan

Hypernyms: abstain, abstinence, desist, refrain

Origin of the word Fast

  1. O.E. f?st "firmly fixed, steadfast," probably from P.Gmc. *fastuz (cf. O.N. fastr, Du. vast, Ger. fest), from PIE base *past- "firm" (cf. Skt. pastyam "dwelling place"). The adv. meaning "quickly, swiftly" was perhaps in O.E., or from O.N. fast, either way developing from the sense of "firmly, strongly, vigorously" (cf. more
  2. O.E. f?stan "to fast" (as a religious duty), from P.Gmc. *fastejan (cf. O.Fris. festia, O.H.G. fasten, O.N. fasta), from the same root as fast (adj.). The original meaning was "hold firmly," and the sense evolution is via "firm control of oneself," to "holding to observance" (cf. Goth. fastan "to keep, observe," also "to fast"). Presuma… more

via Online Etymology Dictionary, ©2001 Douglas Harper

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