optimism
Americannoun
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a disposition or tendency to look on the more favorable side of events or conditions and to expect the most favorable outcome.
- Synonyms:
- cheerfulness, hopefulness, confidence
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the belief that good ultimately predominates over evil in the world.
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the belief that goodness pervades reality.
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the doctrine that the existing world is the best of all possible worlds.
noun
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the tendency to expect the best and see the best in all things
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hopefulness; confidence
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the doctrine of the ultimate triumph of good over evil
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the philosophical doctrine that this is the best of all possible worlds
Other Word Forms
- antioptimism noun
- optimist noun
- optimistic adjective
- optimistically adverb
- overoptimism noun
Etymology
Origin of optimism
First recorded in 1730–40; from French optimisme, from Latin optim(um) ( see optimum) + French -isme -ism
Explanation
Optimism is all about seeing the bright side of things. If you think it’s going to be a great day, even though the bills are due, you lost your wallet, and you forgot your lunch, then you're full of optimism. Optimism is expecting that the best will happen. It comes from the Latin word optimus, which means "best." Even if you don’t think the very best thing will always happen, if you're generally given to optimism, you think things will get better instead of worse. The opposite of optimism is pessimism, which is the expectation that everything will go wrong, or is wrong.
Vocabulary lists containing optimism
Words for a New Year
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Power Suffix: -ism
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Starting Your New Life: Inspiring Words from Commencement Speeches
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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.
Intel’s stock surge reflects growing optimism about the foundry business, which manufactures chips for external customers.
From MarketWatch • Apr. 29, 2026
The basis for that optimism is that the CBO projections are based on the assumption that Social Security trust funds will be fully funded and thus able to pay full benefits scheduled under current law.
From MarketWatch • Apr. 28, 2026
The options market shows caution for major stock indexes but optimism for top technology stocks ahead of a busy event-driven week.
From Barron's • Apr. 28, 2026
Oil prices rose more than 2% and market optimism over a near-term resolution of the Iran war might soon start to fade if the U.S.-Iran stalemate continues.
From The Wall Street Journal • Apr. 27, 2026
Both sides were hoping for a plea bargain, but as time went on Jasmine’s shining optimism faded.
From "The 57 Bus" by Dashka Slater
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
