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FAST definition: moving or able to move, operate, function, or take effect quickly; quick; swift; rapid: a fast pain reliever; See examples of fast used in a sentence.

Grammar Fast, quick or quickly? Fast and quick mean moving with great speed. Fast is both an adjective and an adverb. Quick is an adjective and the adverb form is quickly. …

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Aug 18, 2025 · Here's how to watch the 'Fast & Furious' movies in order, from the original that started it all to the bonkers sequels and beyond.

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Fast means happening, moving, or doing something at great speed. You also use fast in questions or statements about speed. ...fast cars with flashing lights and sirens. The only question is how …

fast, rapid, swift, fleet, quick, speedy, hasty, expeditious mean moving, proceeding, or acting with celerity. fast and rapid are very close in meaning, but fast applies particularly to the thing that …