WordReference Random House Unabridged Dictionary of American English © 2026
group′ veloc′ity, [Physics.]
  1. Physicsthe velocity of finite numbers of waves undergoing simple harmonic motion, equal to the phase velocity when it does not vary with the wavelengths of the waves. The group velocity of the set of waves produced in water when a stone is dropped is less than the velocity of the individual waves.
  • 1885–90

'group velocity' also found in these entries (note: many are not synonyms or translations):
particle velocity - phase velocity

Forum discussions with the word(s) "group velocity" in the title:


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