Definition of ascertain
- ascertain the truth
- trying to ascertain the cause of the fire
- information that can be easily ascertained on the Internet
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ascertain.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: 15th centurySee Words from the same year
What made you want to look up ascertain? Please tell us where you read or heard it (including the quote, if possible).