Dictionary.com
Thesaurus.com
Synonyms

big idea

American  

noun

Informal.
  1. any plan or proposal that is grandiose, impractical, and usually unsolicited.

    You're always coming around here with your big ideas.

  2. purpose; intention; aim.

    What's the big idea of shouting at me?


Etymology

Origin of big idea

An Americanism dating back to 1920–25

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“The Death of Robin Hood’s” one big idea is compelling: History gets written and erased in real time.

From Los Angeles Times Jun. 18, 2026

Presumably whenever a stockpicker—whether investor or analyst—chooses the next big idea, that choice isn’t made cavalierly.

From Barron's Jun. 10, 2026

But then, the agency people unveiled their big idea: to create a campaign centered around reanimated digital avatars of our dead loved ones.

From Slate Apr. 23, 2026

The big idea was to take Tesla’s learnings from its self-driving technology, which uses software and cameras to autonomously drive automobiles.

From The Wall Street Journal Jan. 3, 2026

One big idea behind finding your model was that when you did, you’d glimpse your future.

From "Never Let Me Go" by Kazuo Ishiguro

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training