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heartbeat definition

heart·beat (härt′bēt′)

noun

    1. one pulsation, or full contraction and dilation, of the heart
    2. the continuous series of such pulsations constituting the rhythmic beating of the heart an irregular heartbeat
  2. a very brief period of time; moment; instant reappeared in a heartbeat
  3. the vital core or motivating force

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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