Added 29 September 2026 optimistic /ˌɒptɪˈmɪstɪk/ adjective Categories: Describing WordsUncommon Words adjective ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about optimistic at Wordnik → Where our words come from → Expecting the best in all possible ways. in an optimistic mood Allowing other processes to perform transactions on the same data at the same time, and checking for conflicts only when changes need to be written back. optimistic concurrency Related Words: starry-eyedpollyannaishpositivecheerfulaffirmativebullishupbeatsanguinerose-coloredrosyhopefulconfidence Back to today's word