Click any word in a definition or example to find the entry for that word
90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
The thesaurus of synonyms and related words is fully integrated into the dictionary entries. Click on the T button in an entry to review the synonyms and related words for that meaning.more
Police are trying to ascertain the facts of the case.
We need to ascertain whether the project is feasible.
This much could easily be ascertained from the newspapers.
Experts were unable to ascertain the cause of the accident.
The police have ascertained that he knew the victim.
This is the American English definition of ascertain. View British English definition of ascertain.