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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 im·pe·tus /ˈɪmpətəs/
 動力,推動力,激勵

From: Webster's Revised Unabridged Dictionary (1913)

 Im·pe·tus n.
 1. A property possessed by a moving body in virtue of its weight and its motion; the force with which any body is driven or impelled; momentum.
 Note:Momentum is the technical term, impetus its popular equivalent, yet differing from it as applied commonly to bodies moving or moved suddenly or violently, and indicating the origin and intensity of the motion, rather than its quantity or effectiveness.
 2. Fig.: Impulse; incentive; stimulus; vigor; force; as, the President's strong recommendation provided the impetus needed to pass the campaign reform bill.
 3. Gun. The altitude through which a heavy body must fall to acquire a velocity equal to that with which a ball is discharged from a piece.
 

From: WordNet (r) 2.0

 impetus
      n 1: a force that moves something along [syn: drift, impulsion]
      2: the act of applying force suddenly; "the impulse knocked him
         over" [syn: impulse, impulsion]