Definitions:

1. to establish after a calculation, investigation, experiment, survey, or study verb
   • I ascertained the moth's growth cycle.
2. to find out, learn, or determine with certainty, usually by making an inquiry or other effort verb
   • They ascertained the facts of the crime.
3. to learn or discover with certainty verb
   • The detective ascertained that the suspect was at home on the night of the crime.

Synonyms:

• check
• find

NearBy Words:

• ascertainable
• ascertained