S: (adj) flying, quick, fast (hurried and brief) "paid a flying visit"; "took a flying glance at the book"; "a quick inspection"; "a fast visit"
S: (adj) fast, firm, immobile (securely fixed in place) "the post was still firm after being hit by the car"
S: (adj) 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: (adj) fast ((of a photographic lens or emulsion) causing a shortening of exposure time) "a fast lens"
Adverb
S: (adv) 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"
S: (adv) fast, tight (firmly or closely) "held fast to the rope"; "her foot was stuck fast"; "held tight"