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Open English Wordnet Nouns Verbs (v) fast abstain from certain foods, as for religious or medical reasons “Catholics sometimes fast during Lent”
(v) fast abstain from eating “Before the medical exam, you must fast”
Adjectives (a) fast acting or moving or capable of acting or moving quickly “fast film” ,
“on the fast track in school” ,
“set a fast pace” ,
“a fast car”
(a) fast (used of timepieces) indicating a time ahead of or later than the correct time “my watch is fast”
(a) fast at a rapid tempo “the band played a fast fox trot”
(s) fast (of surfaces) conducive to rapid speeds “a fast road” ,
“grass courts are faster than clay”
(s) fast resistant to destruction or fading “fast colors”
(s) debauched , degenerate , degraded , dissipated , dissolute , libertine , profligate , riotous , fast unrestrained by convention or morality “Congreve draws a debauched aristocratic society” ,
“deplorably dissipated and degraded” ,
“riotous living” ,
“fast women”
(s) flying , quick , fast hurried and brief “paid a flying visit” ,
“took a flying glance at the book” ,
“a quick inspection” ,
“a fast visit”
(s) fast , firm , immobile securely fixed in place “the post was still firm after being hit by the car”
(s) firm , loyal , truehearted , fast unwavering in devotion to friend or vow or cause “a firm ally” ,
“loyal supporters” ,
“the true-hearted soldier...of Tippecanoe” (Campaign song for William Henry Harrison) ,
“fast friends”
(s) fast (of a photographic lens or emulsion) causing a shortening of exposure time “a fast lens”
Adverbs (r) fast quickly or rapidly (often used as a combining form) “how fast can he get here?” ,
“ran as fast as he could” ,
“needs medical help fast” ,
“fast-running rivers” ,
“fast-breaking news” ,
“fast-opening (or fast-closing) shutters”
(r) fast , tight firmly or closely “held fast to the rope” ,
“her foot was stuck fast” ,
“held tight”