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Synonyms

brainless

American  
[breyn-lis] / ˈbreɪn lɪs /

adjective

  1. mentally weak; foolish; witless; stupid.


brainless British  
/ ˈbreɪnlɪs /

adjective

  1. stupid or foolish

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of brainless

First recorded in 1400–50, brainless is from the late Middle English word braynles. See brain, -less

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.

So it goes throughout this visually mammoth but brainless audio-visual excursion.

From The Wall Street Journal • Dec. 17, 2025

A stunned England woke Sunday to savage criticism after their meek capitulation in the first Ashes Test, branded "brainless" and "damaged" by former greats after their cavalier approach backfired.

From Barron's • Nov. 23, 2025

Former Black Cats striker Marco Gabbiadini described that response as "brainless", but there is no doubt Watson has had the last laugh in a way nobody will ever forget.

From BBC • May 24, 2025

I'm not saying that bombast is automatically brainless.

From Salon • Apr. 28, 2025

“But who cares, we’ve got what we needed —” “He is not a brainless git,” said Hermione shrilly as they half ran toward the library.

From "Harry Potter And The Chamber Of Secrets" by J. K. Rowling

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