theory

Pronunciation

• (UK) IPA ^(key): /ˈθɪəri/ or /ˈθiːəri/ or /ˈθɪri/
• (US) IPA ^(key): /ˈθiːəri/ or /ˈθɪri/

• Audio (US)

  (file)

Noun

Singular theory

Plural theories

1. (countable) A theory is an idea that tries to explain an observation.

   The new information showed that his theory about growth was incorrect.

   Nobody has disproved Einstein's theory of general relativity.

Related words

• theorist