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Definition of rapid:

  1. Advancing with haste or speed; speedy in progression; in quick sequence; as, rapid growth; rapid improvement; rapid recurrence; rapid succession.
  2. Quick in execution; as, a rapid penman.
  3. The part of a river where the current moves with great swiftness, but without actual waterfall or cascade; - usually in the plural; as, the Lachine rapids in the St. Lawrence.
  4. Very swift or quick; moving with celerity; fast; as, a rapid stream; a rapid flight; a rapid motion.


splitting, ready, lively, zippy, blistering, mercurial, agile, whirlwind, nippy, lightning, hell-for-leather, spry, prompt, short, fleet-footed, rapid-fire, active, rattling, sluggish, brief, winged, hot, dizzy, listless.

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