English Reference
noun

optimism

n.
US /ˈɑptəˌmɪzəm/ UK /ˈɒptɪmˌɪzəm/ op·ti·mism UK spelling optimisms

  1. 01 B1 Intermediate

    a feeling that good things will happen or that a situation will be successful.

    a general tendency to expect the best possible outcome or to dwell on the most hopeful aspects of a situation.

    Simple

    Despite the difficult news, she maintained her optimism about the future of the company.

    In context

    Market analysts expressed cautious optimism that the new fiscal policy would eventually stabilise the volatile currency.

  2. 02 C2 Proficiency AcademicFormal Religion

    the belief that the world we live in is the best one possible.

    the philosophical doctrine that this world is the best of all possible worlds, or that good will ultimately prevail over evil.

    Simple

    The professor explained the history of optimism as a religious and philosophical theory.

    In context

    Voltaire's 'Candide' serves as a biting satire of the blind optimism championed by certain eighteenth-century philosophers.

    Usage

    Often used as an uncountable noun in this abstract sense.

    leibnizianism

The political terrain on trade today is far different than it was amid the premature optimism of last fall.

Toronto Sun· 17 Aug 2026

Optimism was back at last, on and off the pitch.

The Guardian· 17 Aug 2026

From French optimisme, equivalent to Latin optimus + -ism.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated