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Adjective fast has 10 senses
- 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"
Antonyms: slow, bumper-to-bumper, dilatory, laggard, poky, pokey, dragging, drawn-out, lazy, long-play, long-playing, slow-moving, sluggish
- fast - (used of timepieces) indicating a time ahead of or later than the correct time; "my watch is fast"
- fast - at a rapid tempo; "the band played a fast fox trot"
Antonyms: slow, adagio, andante, lento, lentissimo, largo, larghetto, larghissimo, moderato
- fast - (of surfaces) conducive to rapid speeds; "a fast road"; "grass courts are faster than clay"
Antonyms: rough, unsmooth (indirect, via smooth)
- barred, bolted, fast, latched, locked, secured - firmly fastened or secured against opening; "windows and doors were all fast"; "a locked closet"; "left the house properly secured"
Antonym: unfastened (indirect, via fastened)
- fast - resistant to destruction or fading; "fast colors"
Antonym: pervious (indirect, via impervious)
- 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"
Antonym: moral (indirect, via immoral, amoral)
Antonyms: amoral, unmoral (indirect, via moral, immoral)
- flying, quick, fast - hurried and brief; "paid a flying visit"; "took a flying glance at the book"; "a quick inspection"; "a fast visit"
Antonym: unhurried (indirect, via hurried)
- fast, firm, immobile - securely fixed in place; "the post was still firm after being hit by the car"
Antonym: unfixed (indirect, via fixed)
- 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"
Antonym: unfaithful (indirect, via faithful)