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Definitions

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.

There is ample cause for optimism about America.

From The Wall Street Journal • Apr. 7, 2026

U.S. stocks closed higher on Monday on optimism around a potential cease-fire and an off-ramp to the war.

From MarketWatch • Apr. 6, 2026

Another factor that may test investor optimism this week is the fact that the S&P 500 has yet to reclaim its 200-day moving average of 6624, a key data point used for predicting future performance.

From Barron's • Apr. 6, 2026

But 92 minutes in Manchester quickly did for any such optimism, with the number of potential trophies that might garnish Salah's farewell swiftly halved.

From BBC • Apr. 4, 2026

These reminders of the yellow fever did not shake the spirit of optimism that gripped the city.

From "An American Plague: The True and Terrifying Story of the Yellow Fever Epidemic of 1793" by Jim Murphy

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.