How to Fast. Fasting, the act of abstaining from food and drink for a defined amount of time, is a practice that has been employed to promote physical and spiritual. How to Fast As a Christian. Fasting is a sacred time in which Christians abstain from food, or other pleasures, and take the time to focus on God. If you. 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 more. How fast is your download speed? In seconds, Fast.com's simple Internet speed test will estimate your ISP speed. The worlds best online alternative clothing store. Featuring the best in punk streetwear grunge metal and gothic clothing & accessoires. 1 a: firmly fixed roots fast in the ground b: tightly shut the drawers were fast c: adhering firmly The boards were fast a few hours after being glued together. d. fast 1 (făst) adj. fast·er, fast·est. 1. Acting, moving, or capable of acting or moving quickly; swift. 2. a. Accomplished in relatively little time: a fast visit. Synonyms for fast at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day. Compound Forms/Forme composte: Inglese: Italiano: acid-fast n noun: Refers to person, place, thing, quality, etc. (resistant to acid) resistente agli acidi agg Fasting is a willing abstinence or reduction from some or all food, drink, or both, for a period of time. An absolute fast (dry fasting) is normally.