[adverb] 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"
[adverb] firmly or tightly; "held fast to the rope"; "her foot was stuck fast"; "held tight" Synonyms: tight
[verb] abstain from certain foods, as for religious or medical reasons; "Catholics sometimes fast during Lent"
[verb] abstain from eating; "Before the medical exam, you must fast"
[adjective] 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"
[adjective] (used of timepieces) indicating a time ahead of or later than the correct time; "my watch is fast"
[adjective] at a rapid tempo; "the band played a fast fox trot"
[adjective] (of surfaces) conducive to rapid speeds; "a fast road"; "grass courts are faster than clay"
[adjective] firmly fastened or secured against opening; "windows and doors were all fast"; "a locked closet"; "left the house properly secured" Synonyms: barred, bolted, latched, locked, secured
[adjective] resistant to destruction or fading; "fast colors"
[adjective] hurried and brief; "paid a flying visit"; "took a flying glance at the book"; "a quick inspection"; "a fast visit" Synonyms: flying, quick
[adjective] securely fixed in place; "the post was still firm after being hit by the car" Synonyms: firm, immobile
[adjective] 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" Synonyms: firm, loyal, truehearted
