Standard Lemma guide

brain-dead

adj · noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈbɹeɪnˌdɛd/
  • US: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Having an irreversible loss of brain function and cessation of brain activity.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Having no useful thoughts; stupid; ditzy.

Definition source: English Wiktionary via Wiktextract

Usage: colloquial, derogatory

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An unintelligent person.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, informal

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From brain + dead. Coined by the Harvard physician Henry K. Beecher in the historical context of the Sixties counterculture and life extension technology of the late twentieth century.

Across languages

Translations

30 source translations are retained for this English entry.

  • Afrikaans: breindood — in medicine: having irreversible cessation of brain activity
  • Danish: hjernedød — in medicine: having irreversible cessation of brain activity
  • Dutch: hersendood — in medicine: having irreversible cessation of brain activity
  • Finnish: aivokuollut — in medicine: having irreversible cessation of brain activity
  • French: en état de mort cérébrale — in medicine: having irreversible cessation of brain activity
  • German: hirntot — in medicine: having irreversible cessation of brain activity
  • Hungarian: agyhalott — in medicine: having irreversible cessation of brain activity
  • Norwegian Bokmål: hjernedød — in medicine: having irreversible cessation of brain activity
  • Norwegian Nynorsk: hjernedød — in medicine: having irreversible cessation of brain activity
  • Norwegian Nynorsk: hjernedaud — in medicine: having irreversible cessation of brain activity
  • Polish: w stanie śmierci mózgu — in medicine: having irreversible cessation of brain activity
  • Portuguese: com morte cerebral — in medicine: having irreversible cessation of brain activity
  • Portuguese: cerebralmente morto — in medicine: having irreversible cessation of brain activity
  • Spanish: muerto cerebral — in medicine: having irreversible cessation of brain activity
  • Swedish: hjärndöd — in medicine: having irreversible cessation of brain activity
  • Chinese Mandarin: 脑残 (nǎocán) — colloquially: having no useful thoughts
  • Danish: hjernedød — colloquially: having no useful thoughts
  • Danish: åndssvag — colloquially: having no useful thoughts
  • Finnish: aivoton — colloquially: having no useful thoughts
  • Finnish: järjetön — colloquially: having no useful thoughts
  • Finnish: älyvapaa — colloquially: having no useful thoughts
  • Italian: cerebroleso — colloquially: having no useful thoughts
  • Italian: testa vuota — colloquially: having no useful thoughts
  • Norwegian Bokmål: hjernedød — colloquially: having no useful thoughts
  • Norwegian Nynorsk: hjernedød — colloquially: having no useful thoughts
  • Norwegian Nynorsk: hjernedaud — colloquially: having no useful thoughts
  • Portuguese: descerebrado — colloquially: having no useful thoughts
  • Spanish: muerto cerebral — colloquially: having no useful thoughts
  • Spanish: descerebrado — colloquially: having no useful thoughts
  • Swedish: hjärndöd — colloquially: having no useful thoughts