Definition of Ascertain

Verb: ascertain ,a-su(r)'teyn

Establish after a calculation, investigation, experiment, survey, or study
"ascertain the product of two numbers";
- determine, find, find out
Be careful or certain to do something; make certain of something
- see, check, insure, see to it, ensure, control, assure
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
Learn or discover with certainty