Definition as Verb

• learn or discover with certainty
• establish after a calculation, investigation, experiment, survey, or study
• find out, learn, or determine with certainty, usually by making an inquiry or other effort
• be careful or certain to do something; make certain of something

• determine, find, find out

• determine, check, find out, see, watch, learn

• see, check, insure, see to it, ensure, control, assure

• "find the product of two numbers"; "The physicist who found the elusive particle won the Nobel Prize"

• "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"

• "He verified that the valves were closed"; "See that the curtains are closed"; "control the quality of the product"

• Ascertain vs determine
• Ascertain vs find
• Ascertain vs find out
• Ascertain vs check
• Ascertain vs see
• Ascertain vs watch
• Ascertain vs learn
• Ascertain vs insure
• Ascertain vs see to it
• Ascertain vs ensure
• Ascertain vs control
• Ascertain vs assure