brainless

adjective
brain·less | \ˈbrān-ləs \

Definition of brainless 

1 : devoid of intelligence : stupid a brainless decision

2 : not demanding understanding or intelligence : dull, stupefying a brainless task brainless repetition

3 : lacking a brain brainless organisms

Keep scrolling for more

Other Words from brainless

brainlessly adverb
brainlessness noun

Examples of brainless in a Sentence

He thought most of his coworkers were brainless. The plot of the new movie is brainless and the acting is terrible.

Recent Examples on the Web

Not the brainless brutes of our imaginations, Neanderthals apparently used advanced hunting techniques to stalk and kill their prey, a new study suggests. Doyle Rice, USA TODAY, "How to hunt like a Neanderthal: Ancient humans got up close with their prey," 26 June 2018 Well, in the land of brainless politicians, even no-brainer pieces of legislation sometimes go nowhere. Heather Knight, SFChronicle.com, "Car break-in crackdown bill made perfect sense. California lawmakers killed it," 15 June 2018 In the last two decades, researchers have identified sleep-like behavior in fruit flies, tiny nematodes, and even a brainless jellyfish. Michael Greshko, National Geographic, "Brainless Creatures Can Do Some Incredibly Smart Things," 21 May 2018 Here are a few examples of brainless organisms that are actually pretty smart. Michael Greshko, National Geographic, "Brainless Creatures Can Do Some Incredibly Smart Things," 21 May 2018 What a heartless, wicked, brainless thing to do! . . Kathryn Schulz, The New Yorker, "Broadway’s Original Mansplainer," 23 Apr. 2018 The scientists found that this procedure rescued the brainless tadpoles from most of the usual defects. Adam Rogers, WIRED, "Brainless Embryos Suggest Bioelectricity Guides Growth," 18 Mar. 2018 Why would anyone devote her life to a brainless, spineless, gutless group of parasites? Sarah Kaplan, Washington Post, "Tapeworms are brainless, spineless, gutless parasites — and this scientist loves them," 2 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'brainless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of brainless

15th century, in the meaning defined above

Keep scrolling for more

Learn More about brainless

Statistics for brainless

Last Updated

21 Aug 2018

Look-up Popularity

Time Traveler for brainless

The first known use of brainless was in the 15th century

See more words from the same century

Keep scrolling for more

More Definitions for brainless

brainless

adjective

English Language Learners Definition of brainless

: very stupid or silly

Keep scrolling for more

Comments on brainless

What made you want to look up brainless? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!