fast

abstaining from food

abstain from certain foods, as for religious or medical reasons; "Catholics sometimes fast during Lent"

abstain from eating; "Before the medical exam, you must 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"

(used of timepieces) indicating a time ahead of or later than the correct time; "my watch is fast"

at a rapid tempo; "the band played a fast fox trot"

(of surfaces) conducive to rapid speeds; "a fast road"; "grass courts are faster than clay"

resistant to destruction or fading; "fast colors"

unrestrained by convention or morality; "Congreve draws a debauched aristocratic society"; "deplorably dissipated and degraded"; "riotous living"; "fast women"

hurried and brief; "paid a flying visit"; "took a flying glance at the book"; "a quick inspection"; "a fast visit"

securely fixed in place; "the post was still firm after being hit by the car"

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"

(of a photographic lens or emulsion) causing a shortening of exposure time; "a fast lens"

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"

firmly or closely; "held fast to the rope"; "her foot was stuck fast"; "held tight"