WordReference Random House Learner's Dictionary of American English © 2019
am•pli•tude /ˈæmplɪˌtud, -ˌtyud/USA pronunciation   n. [uncountable]
  1. the state or quality of being ample;
    fullness;
    largeness.
  2. large or full measure;
    abundance.
See -ampl-.
WordReference Random House Unabridged Dictionary of American English © 2019
am•pli•tude  (ampli to̅o̅d′, -tyo̅o̅d′),USA pronunciation n. 
  1. the state or quality of being ample, esp. as to breadth or width;
    largeness;
    greatness of extent.
  2. large or full measure;
    abundance;
    copiousness.
  3. mental range, scope, or capacity.
  4. Physicsthe absolute value of the maximum displacement from a zero value during one period of an oscillation.
  5. Electricitythe maximum deviation of an alternating current from its average value.
  6. Astronomythe arc of the horizon measured from the east or west point to the point where a vertical circle through a heavenly body would intersect the horizon.
  7. Mathematicsargument (def. 8b).
  • Latin amplitūdō. See ample, -i-, -tude
  • 1540–50


Collins Concise English Dictionary © HarperCollins Publishers::

amplitude /ˈæmplɪˌtjuːd/ n
  1. greatness of extent; magnitude
  2. abundance or copiousness
  3. breadth or scope, as of the mind
  4. the angular distance along the horizon measured from true east or west to the point of intersection of the vertical circle passing through a celestial body
  5. the maximum variation from the zero or mean value of a periodically varying quantity
Etymology: 16th Century: from Latin amplitūdō breadth, from amplus spacious



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