Definition of polygraph in English:


Pronunciation /ˈpälēˌɡraf/ /ˈpɑliˌɡræf/

Translate polygraph into Spanish


  • 1A machine designed to detect and record changes in physiological characteristics, such as a person's pulse and breathing rates, used especially as a lie detector.

    ‘Lie-detector technology has moved on from cumbersome polygraphs that measure physiological responses to questions.’
    • ‘He invented a lie-detecting machine called the polygraph.’
    • ‘Traditional lie detectors, known as polygraphs, measure heart and respiratory rates as a person answers questions.’
    • ‘Guilty people can also beat polygraphs by suppressing their physiological reactions with the help of mental countermeasures such as meditation or physical ones such as drugs.’
    • ‘They found out that polygraphs did not detect these people lying.’
    • ‘Depending on the mode of recording, the signal has to be amplified for feeding a polygraph or digitized for recording on hard disk.’
    • ‘Mechanical activity was recorded on a polygraph via isometric transducers.’
    • ‘The results suggest that fMRI may one day prove a more accurate lie detector than the polygraph.’
    • ‘But during her polygraph examination, the machine showed that her perspiration and skin resistance were abnormal.’
    • ‘Objective responses are recorded on a polygraph trace.’
    • ‘Also within the Shaughnessy affidavit are details of polygraph - lie detector - evidence which throws the entire prosecution theory into chaos.’
    • ‘He'd show them the communications center, neat gear such as polygraphs and Breathalyzers, demonstrate photography and fingerprinting, and generally try to show them a good time and build a positive rapport.’
    • ‘Well, I tell you what - No.1, polygraphs, truth detectors, lie detectors are not allowed in the courts, even down there in Aruba.’
    • ‘He did not invent the polygraph, but he did design the Backster control question technique, called the zone technique.’
    • ‘One was setting up a polygraph, laying out the lie detector's telltale wires and cords.’
    • ‘The subject was asked to stand up immediately and changes in the heart rate were noted in the polygraph.’
    • ‘One of the points that Stephen Hatfill also made - and you're an authority on this, you know something about polygraphs given your former line of work in the Defense Intelligence Agency.’
    • ‘Accomplished liars will beat polygraphs, mislead interrogators, and hoodwink the most sophisticated security regime.’
    • ‘And it was a big turnaround for him to suddenly decry the use of polygraphs.’
    • ‘Dr Zuhair Bandar and his team at Manchester Metropolitan University say the system has already proved more accurate than traditional polygraphs.’
    1. 1.1A lie-detector test carried out with a polygraph.
      ‘if he passed the polygraph, of course, it would authenticate his story’
      • ‘And Johnny Skakel, his brother, who was one of those witnesses, was tested by polygraph and passed the polygraph.’
      • ‘They've gone in and they've passed the polygraphs, and they've done the right thing.’
      • ‘Now the only thing we know about polygraphs is if you pass the first one, you don't get a second one.’
      • ‘But the snitch failed a polygraph and Guandique passed one.’
      • ‘Also, apparently, he took a polygraph, but one of the things that was omitted from the statement was whether or not he passed the polygraph.’
      • ‘But as to that man's claims, I understand also his representative says he passed a polygraph.’
      • ‘I think it's important that people know they passed the polygraph; that this little girl is in danger.’
      • ‘She could take and pass a polygraph with flying colors because she may really have no knowledge about his whereabouts.’
      • ‘And the prosecutors still argued that my client was guilty when they knew he passed the polygraph.’
      • ‘And he passed the polygraph, but he was a suspect and then they eliminated him.’
      • ‘Given the polygraph's dubious record, resistance to the lie detector has started to stir.’
      • ‘The polygraphs were taken as part of the investigation by Pan Am's defence team who were fighting civil court actions brought by the families of the Lockerbie dead.’
      • ‘There's a specific code section that says polygraphs aren't admissible.’
      • ‘And as a matter of fact, Larry, I have asked for polygraphs from defense attorneys in the past.’
      • ‘Their lawyer had said they didn't want the FBI to conduct the polygraphs.’
      • ‘What's wrong with letting members of Congress take polygraphs?’
      • ‘He hasn't told us whether he took other polygraphs, whether or not he flunked those with other polygraphers or with this guy, Barry.’
      • ‘We've initiated polygraphs, we've initiated very tight security.’
      • ‘Several of the family members have taken polygraphs.’
      • ‘Reve and I went in the first day and took polygraphs.’