Phrase guide

tinfoil hat

noun · 2 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

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A piece of headgear made from one or more sheets of tin foil, aluminium foil, or other similar material; especially when worn in the belief that it shields the brain from electromagnetic fields or against mind control or mind reading.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: TFH

Antonyms: none provided

2

noun

Meaning 2

A conspiracy theorist.

Definition source: English Wiktionary via Wiktextract

Usage: derogatory, metonymically

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

No etymology was provided for this word.

Across languages

Translations

10 source translations are retained for this English entry.

  • Arabic: قُبْعَةِ الْأَلُومِنْيُوم (qubʕati l-ʔalūminyūm) — tinfoil hat
  • Chinese Mandarin: 錫箔帽 /锡箔帽 (xībómào) — tinfoil hat
  • Danish: sølvpapirshat — tinfoil hat
  • Faroese: súllpappírshattur — tinfoil hat
  • Finnish: foliohattu — tinfoil hat
  • French: chapeau en aluminium — tinfoil hat
  • German: Aluhut — tinfoil hat
  • Polish: czapka foliowa — tinfoil hat
  • Spanish: sombrero de aluminio — tinfoil hat
  • Swedish: foliehatt — tinfoil hat