conspiracy theory

noun

Definition of conspiracy theory

:a theory that explains an event or set of circumstances as the result of a secret plot by usually powerful conspirators

conspiracy theorist

noun

Examples of conspiracy theory in a Sentence

  1. Conspiracy theories sprung up soon after the leader's assassination.

First Known Use of conspiracy theory

1871


CONSPIRACY THEORY Defined for English Language Learners

conspiracy theory

noun

Definition of conspiracy theory for English Language Learners

  • : a theory that explains an event or situation as the result of a secret plan by usually powerful people or groups


Seen and Heard

What made you want to look up conspiracy theory? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

agreeable, attractive, or delicious

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!