ascertain
verb (used with object)
to find out definitely; learn with certainty or assurance; determine.
have ascertained
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present perfectof ascertain.present perfect
Used to describe actions that started in the past and continue into or have direct relevance to the present.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"Emergency services are securing the 5-storey building, so far they have ascertained nothing," tweeted Berlin police, adding the road the building was on had been blocked off.
From Reuters ● Feb. 16, 2023
Only once they have ascertained that photons look like photons, electrons look like electrons, and so on, can they have confidence in their results.
From Scientific American ● Apr. 27, 2022
Fact-checkers Logically have ascertained that the photograph is an image of a Ukrainian soldier from August 2021.
From BBC ● Mar. 7, 2022
So, once you have ascertained that you can make the trip, write down questions about testing to consider such as:
From Washington Post ● Dec. 2, 2021
As for Mr and Mrs Taylor themselves, I have ascertained that they ran the village green grocery here from the twenties until their retirement three years ago.
From "The Remains of the Day" by Kazuo Ishiguro
