big idea

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?

Word History and Origins

Origin of big idea¹

An Americanism dating back to 1920–25

Related Words

• approach 
• attention 
• attitude 
• awareness 
• concept 
• consciousness 
• feeling 
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• impression 
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• notion 
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• taste 
• thought 
• viewpoint