optimism

[op-tuh-miz-uhm] / ˈɒp təˌmɪz əm /

NOUN

state of having positive beliefs

Synonyms

STRONGEST

anticipation certainty confidence elation enthusiasm expectation happiness idealism trust

STRONG

assurance brightness buoyancy calmness cheer cheerfulness easiness encouragement exhilaration hopefulness positivism sanguineness sureness

WEAK

good cheer looking on bright side rose-colored glasses

Antonyms

STRONGEST

depression distrust doubt fear sadness sorrow uncertainty unhappiness

STRONG

discouragement gloom

WEAK

hopelessness pessimism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A rare decade-long interlude starting in 2011 saw the top brass loosen their grip and Suu Kyi's civilian government tentatively take the reins in a burst of optimism and reform.

From Barron's • Apr. 10, 2026

“Cautious optimism may prevail today as markets are contemplating prospects for successful cease-fire negotiations over the weekend,” Commerzbank’s Hauke Siemssen said in a note.

From The Wall Street Journal • Apr. 10, 2026

New treatments, including monoclonal antibodies such as lecanemab and donanemab, have offered some optimism by slowing cognitive decline.

From Science Daily • Apr. 10, 2026

Also, the rise in U.S. stocks on Wednesday may have been driven partly by traders unwinding short positions, meaning it’s not just about bullish optimism.

From MarketWatch • Apr. 9, 2026

But more and more I suspected Mami’s optimism was a front.

From "When I Was Puerto Rican" by Esmeralda Santiago

Vocabulary lists containing optimism

Words for a New Year

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Power Suffix: -ism

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Starting Your New Life: Inspiring Words from Commencement Speeches

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!