optimism

American  

[op-tuh-miz-uhm] / ˈɒp təˌmɪz əm /

noun

1. 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

   Antonyms:

   cynicism, pessimism

2. the belief that good ultimately predominates over evil in the world.

   Antonyms:

   cynicism, pessimism

3. the belief that goodness pervades reality.

4. the doctrine that the existing world is the best of all possible worlds.

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optimism British  

/ ˈɒptɪˌmɪzəm /

noun

1. the tendency to expect the best and see the best in all things

2. hopefulness; confidence

3. the doctrine of the ultimate triumph of good over evil

4. the philosophical doctrine that this is the best of all possible worlds

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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.

Example Sentences

Crude has jumped about a fifth in the past week, having tumbled last week to one-month lows on optimism that a peace agreement would be reached.

From Barron's • Apr. 24, 2026

But there was also an element of optimism, with some Zambians pleased that conversations about race were slowly becoming more common.

From BBC • Apr. 24, 2026

Its 1Q results benefited from rising metal prices, they note, and expect optimism around core-profit contributor gold to continue, backed by central-bank buying and speculative demand linked to exchange-traded funds.

From The Wall Street Journal • Apr. 22, 2026

Wall Street’s optimism rests on a specific analogy.

From MarketWatch • Apr. 22, 2026

“It is a pity there is no way to tell in advance how much optimism is the correct amount,” she thought as she pinned her dull, drab locks into a dull, drab bun.

From "The Hidden Gallery" by Maryrose Wood

Related Words

• anticipation
• certainty
• confidence
• elation
• enthusiasm
• expectation
• happiness
• idealism
• trust