Added 9 October 2026 optimist /ˈɑptɪmɪst/ noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about optimist at Wordnik → Where our words come from → A person disposed to take a favorable view of things. Related Words: cockeyedhopefulresulthopefulnessupsidepollyannapositive Back to today's word