Definition of ascertain - WordReference.com Dictionary

WordReference.com English Dictionary

ascertain
A	verb
	1	see, check, insure, see to it, ensure, control, ascertain, assure
			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"
		Category Tree: confirm; corroborate; sustain; substantiate; support; affirm ╚verify ╚see, check, insure, see to it, ensure, control, ascertain, assure ╚cover ╚spot-check ╚card ╚cinch ╚cross-check ╚double-check ╚control ╚proofread; proof
	2	ascertain
			learn or discover with certainty
		Category Tree: learn; hear; get word; get wind; pick up; find out; get a line; discover; see ╚ascertain ╚price
	3	determine, find, find out, ascertain
			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"

	4	determine, check, find out, see, ascertain, watch, learn
			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"

Need to be ascertain
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