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Verb: ascertain  ,a-su(r)'teyn
  1. Establish after a calculation, investigation, experiment, survey, or study
    "ascertain the product of two numbers";
    - determine, find, find out
     
  2. Be careful or certain to do something; make certain of something
    - see, check, insure, see to it, ensure, control, assure
     
  3. Find out, learn, or determine with certainty, usually by making an inquiry or other effort
    "ascertain whether the train leaves on time";
    - determine, check, find out, see, watch, learn
     
  4. Learn or discover with certainty

Derived forms: ascertaining, ascertained, ascertains

Type of: discover, find out, get a line, get wind, get word, hear, learn, pick up, see, verify