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Definition of ascertain:

  1. To find out or learn for a certainty, by trial, examination, or experiment; to get to know; as, to ascertain the weight of a commodity, or the purity of a metal.
  2. To make ( a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine.
  3. To render ( a person) certain; to cause to feel certain; to make confident; to assure; to apprise.


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