Fast By Jorie Graham, Internet Speed Test Fast How fast is your download speed In seconds, FAST s simple Internet speed test will estimate your ISP speed. Fast Definition of Fast by Merriam Webster Fast definition is firmly fixed How to use fast in a sentence Synonym Discussion of fast. Fast definition of fast by The Free Dictionary Synonyms fast , rapid, swift, fleet , speedy, quick, expeditious These adjectives refer to something marked by great speed Fast and rapid are often used interchangeably, though fast is often applied to the person or thing in motion, and rapid to the activity or movement involved a fast Fast Definition of Fast at Dictionary Fast definition, moving or able to move, operate, function, or take effect quickly quick swift rapid a fast horse a fast pain reliever a fast thinker See . Fast Synonyms, Fast Antonyms Merriam Webster Thesaurus synonyms of fast from the Merriam Webster Thesaurus, plus related words, definitions, and antonyms Find another word for fast. FAST meaning in the Cambridge English Dictionary fast definition moving or happening quickly, or able to move or happen quickly If your watch or clock is Learn . Juice WRLD Fast Official Audio YouTube Mar , videos Play all Mix Juice WRLD Fast Official Audio YouTube Juice WRLD Flaws and Sins Official Audio Duration Juice WRLD ,, views Fast Synonyms, Fast Antonyms Thesaurus Synonyms for fast at Thesaurus with free online thesaurus, antonyms, and definitions Find descriptive alternatives for fast.