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

Fresh optimism about the economy is evident in the huge rally on Wall Street after the outbreak of the Iran war sent stocks tumbling in March.

From MarketWatch • May 9, 2026

Despite their optimism, the RBC team highlight what they call “tactical risks” that need monitoring.

From MarketWatch • May 8, 2026

Kemi Badneoich has insisted there are ground for optimism and said that "good strategy takes time".

From BBC • May 8, 2026

Market optimism for direct peace negotiations remains despite military skirmishes and the potential for renewed U.S. escort operations.

From Barron's • May 8, 2026

But just as optimism has its dark side, the Peloponnesian War was not without its bright spots, at least in terms of literature.

From "The Hidden Gallery" by Maryrose Wood

Related Words

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