Brainbox

//ˈbɹeɪn(ˌ)bɒks// noun, slang

noun, slang ·Moderate ·College level

Definitions

Noun
  1. 1
    The cavity of the skull in which the brain is contained.

    "Holonyms: skull, cranium < head"

  2. 2
    The skull; the head. slang
  3. 3
    A very intelligent person. slang

Synonyms

All synonyms
beanbeanerbelfryblockboffinbonce

Example

More examples

"Holonyms: skull, cranium < head"

Etymology

From brain + box.

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