as·cer·tain /ˌæsərˈteɪn/
1. establish after a calculation, investigation, experiment, survey, or study; "find the product of two numbers"; "The physicist who found the elusive particle won the Nobel Prize"
synset: determine, find, find_out, ascertain
2. be careful or certain to do something; make certain of something; "He verified that the valves were closed"; "See that the curtains are closed"; "control the quality of the product"
synset: see, check, insure, see_to_it, ensure, control, ascertain, assure
3. find out, learn, or determine with certainty, usually by making an inquiry or other effort; "I want to see whether she speaks French"; "See whether it works"; "find out if he speaks Russian"; "Check whether the train leaves on time"
synset: determine, check, find_out, see, ascertain, watch, learn
4. learn or discover with certainty
synset: ascertain
Princeton University "About WordNet." WordNet. Princeton University. 2010.
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