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Definitions

brainless

[breyn-lis] / ˈbreɪn lɪs /
ADJECTIVE
idiotic
Synonyms
STRONGEST
dumb mindless
WEAK
anencephalic anencephalous foolish imbecile senseless silly stupid thoughtless witless
Antonyms
STRONGEST
intelligent
WEAK
smart

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.

Former England fast bowler Steven Finn, commentating on TNT, said it was "completely brainless".

From BBC • Jan. 4, 2026

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

Meme coins spawned on sites like Pump.fun, where the awful and the brainless alike became speculative fodder.

From The Wall Street Journal • Nov. 21, 2025

I'm not saying that bombast is automatically brainless.

From Salon • Apr. 28, 2025

“That brainless brother of yours will welcome any reason to miss these last weeks of mouse school. He’d sooner drown than finish the semester.”

From "Secrets at Sea" by Richard Peck