Phrase guide

lie detector

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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1

noun

Meaning 1

A device designed to detect or indicate when a person is lying by measuring and recording several physiological variables.

Definition source: English Wiktionary via Wiktextract

Usage: informal

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: pathometer, polygraph

Antonyms: none provided

2

noun

Meaning 2

a polygraph that records bodily changes sometimes associated with lying

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: polygraph

History

Etymology

From lie + detector. First use appears c. 1909. See cite below.

Across languages

Translations

30 source translations are retained for this English entry.

  • Chinese Cantonese: 測謊器 /测谎器 (caak1 fong1 hei3) — polygraph ''(informal)''
  • Chinese Cantonese: 測謊儀 /测谎仪 (caak1 fong1 ji4) — polygraph ''(informal)''
  • Chinese Cantonese: 測謊機 /测谎机 (caak1 fong1 gei1) — polygraph ''(informal)''
  • Chinese Mandarin: 測謊器 /测谎器 (cèhuǎngqì) — polygraph ''(informal)''
  • Chinese Mandarin: 測謊儀 /测谎仪 (cèhuǎngyí) — polygraph ''(informal)''
  • Chinese Mandarin: 測謊機 /测谎机 (cèhuǎngjī) — polygraph ''(informal)''
  • Danish: løgnedetektor — polygraph ''(informal)''
  • Dutch: leugendetector — polygraph ''(informal)''
  • Faroese: lygnkanningartól — polygraph ''(informal)''
  • Faroese: lygnavdúkari — polygraph ''(informal)''
  • Finnish: valheenpaljastin — polygraph ''(informal)''
  • French: détecteur de mensonges — polygraph ''(informal)''
  • German: Lügendetektor — polygraph ''(informal)''
  • Hebrew: מְכוֹנַת אֱמֶת (m'chonát emét) — polygraph ''(informal)''
  • Hungarian: hazugságvizsgáló — polygraph ''(informal)''
  • Icelandic: lygamælir — polygraph ''(informal)''
  • Irish: brathadóir éithigh — polygraph ''(informal)''
  • Japanese: 嘘発見器 (uso-hakkenki) — polygraph ''(informal)''
  • Korean: 거짓말 탐지기 (geojinmal tamjigi) — polygraph ''(informal)''
  • Norwegian Bokmål: løgndetektor — polygraph ''(informal)''
  • Norwegian Nynorsk: lygndetektor — polygraph ''(informal)''
  • Norwegian Nynorsk: løgndetektor — polygraph ''(informal)''
  • Persian: دروغسنج (doruġ-sanj) — polygraph ''(informal)''
  • Polish: wykrywacz kłamstw — polygraph ''(informal)''
  • Portuguese: detector de mentiras — polygraph ''(informal)''
  • Portuguese: polígrafo — polygraph ''(informal)''
  • Russian: дете́ктор лжи́ (detéktor lží) — polygraph ''(informal)''
  • Russian: полигра́ф (poligráf) — polygraph ''(informal)''
  • Swedish: lögndetektor — polygraph ''(informal)''
  • Turkish: yalan makinesi — polygraph ''(informal)''