fast Pronunciation: /fɑːst; (US) fæst/Translate fast | into German | into Italian | into Spanish French translation of fastA. n jeûne (m)B. adj 1 rapide to be a fast reader/runner = lire/courir vite 2 (ahead of time) my watch is fast = ma montre avance you're five minutes fast = ta montre avance de cinq minutesC. adv 1 vite, rapidement how fast can you run? = est-ce que tu cours vite? 2 [hold] ferme; [stuck] bel et bien; [shut] bien to be fast asleep = dormir à poings fermésfast in other Oxford dictionaries Definition of fast in the British & World English dictionary Definition of fast in the US English dictionary