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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.

See Examples For:

Why do we love this story so much, enough to subject ourselves to even the weirdest, most brainless versions of it that can be spun from the public domain?

From Salon Dec. 24, 2025

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

From The Wall Street Journal Dec. 17, 2025

Wolff said after the race that the comments were "brainless".

From BBC Dec. 1, 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

Him too I hate, the same as I hate these brainless budding trees, these brattling birds.

From "Grendel" by John Gardner

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