Pronunciation: [ as-er-teyn ]
Origin: Late Middle English; Latin
Etymology: from Old French acertener, based on Latin certus ‘settled, sure’
1. (verb) to find out definitely; learn with certainty or assurance; determine
Synonym(s): confirm, determine, verify, establish
Antonym(s): disprove, invalidate, confuse, misunderstand
Example: The jury was determined to ascertain all the facts.