No-brainer

noun, slang

noun, slang ·3 syllables ·Moderate ·College level

Definitions

Noun
  1. 1
    An easy or obvious conclusion, decision, solution, task, etc.; something requiring little or no thought. informal

    "If the newer version performs as well for half the cost, the decision is a no-brainer."

  2. 2
    anything that requires little thought wordnet

Synonyms

All synonyms
cakecakewalkdoddleeasy thingpiece of cakeplain sailing

Example

More examples

"It was a no-brainer that Tom would renew his contract, given the huge amount of money he was being offered."

Etymology

From no + brain + -er.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.