Dictionary.com
Thesaurus.com
Showing results for no-brainer. Search instead for o-brien.
Synonyms

no-brainer

American  
[noh-brey-ner] / ˈnoʊˈbreɪ nər /

noun

  1. Informal. anything requiring little thought or effort; something easy or simple to understand or do.


no-brainer British  
/ ˌnəʊˈbreɪnə /

noun

  1. slang something which requires little or no mental effort

"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

no-brainer Cultural  
  1. Something that is absurdly simple or easy and requires little thought: “Making pumpkin pie can be a no-brainer if you use frozen pastry and canned filling.”


Etymology

Origin of no-brainer

First recorded in 1975–80

Explanation

An obvious conclusion or an easy decision is a no-brainer. Adding 2 + 2 is a no-brainer, and so is the decision to accept a generous scholarship. The informal no-brainer describes choices that are so clear they're hardly even choices: they require almost no thought, since one alternative is obviously better. Saying yes to the the prize of a trip for four to Disney World is a no-brainer, and when you're shopping for a new laptop, buying the one with more memory that's less expensive is a no-brainer. No-brainer stems from the idea that it doesn't take brains to make a decision so simple.

Keep Reading on Vocabulary.com

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:

"It was the no-brainer to put Charley first," said Nordqvist.

From BBC Sep. 13, 2026

That means that if the availability of electricity comes into question, abandoning old chips may become a no-brainer.

From The Wall Street Journal Aug. 18, 2026

Carlo Arcilla, former director of the Philippine Nuclear Research Institute, told AFP reintroducing nuclear energy into the conversation was a "no-brainer".

From Barron's Jul. 27, 2026

Refinancing to an ARM seemed like a no-brainer, he said.

From MarketWatch Jul. 22, 2026

For a side dish, sweet corn was a no-brainer.

From "The Omnivore's Dilemma" by Michael Pollan

Vocabulary.com logo
by dictionary.com

Join 14,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training