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Noun: momentum (momenta,momentums)  mow'men-tum or mu'men-tum
  1. An impelling force or strength
    "the car's momentum carried it off the road";
    - impulse
  2. The product of a body's mass and its velocity
    "the momentum of the particles was deduced from meteoritic velocities"
  3. Enough activity to continue going; capacity for further growth
    "the campaign is gaining momentum";
    - steam

Derived forms: momentums, momenta

Type of: force, forcefulness, physical property, strength

Encyclopedia: Momentum