Definition of ascertain

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- Ascertain v
- 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" [syn: {determine}, {find}, {find out}]
- 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" [syn: {see}, {check}, {insure}, {see to it}, {ensure}, {control}, {assure}]
- 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" [syn: {determine}, {check}, {find out}, {see}, {watch}, {learn}]
- Learn or discover with certainty