Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “optimist”

optimist

noun [C] uk   /ˈɒp.tɪ.mɪst/ us    /ˈɑːp.tə-/
C1 someone who always believes that good things will happen: She's a born optimist (= someone who has always been optimistic).Hoping and hopefulnessPotential
(Definition of optimist from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of optimist?
Add Cambridge dictionaries to your browser to your website

Definitions of “optimist” in other dictionaries

Word of the Day

pint

a measure for liquid equal to about half a litre

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More