Meaning of the word ascertained in English

What does ascertained mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

ascertained

US /ˌæs.ərˈteɪnd/
UK /ˌæs.əˈteɪnd/

Verb

found out for certain; made sure of

Example:
The police ascertained that the suspect was not in the country.
We need to ascertain the facts before making a decision.