"motion detector" meaning in English

{
  "forms": [
    {
      "form": "motion detectors",
      "tags": [
        "plural"
      ]
    }
  ],
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    {
      "args": {},
      "expansion": "motion detector (plural motion detectors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
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          "name": "English entries with incorrect language header",
          "parents": [],
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          "kind": "other",
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      "examples": [
        {
          "bold_text_offsets": [
            [
              172,
              188
            ]
          ],
          "ref": "2026 February 27, Paul Salopek, “Hazard Cascade”, in National Geographic:",
          "text": "Higman and his sidekick, a geophysical engineering student named Krishna Divakarla from the Colorado School of Mines, are the volunteer cavalry. They are planting homemade motion detectors on the quivering slopes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A device used in security systems that can alert the user of the presence of a moving object."
      ],
      "id": "en-motion_detector-en-noun-fNQ0P7-Q",
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "lang_code": "cmn",
          "roman": "dòngzuò gǎnyīngqì",
          "sense": "device used in security systems",
          "word": "動作感應器 /动作感应器"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "lang_code": "fi",
          "sense": "device used in security systems",
          "word": "liiketunnistin"
        },
        {
          "code": "de",
          "lang": "German",
          "lang_code": "de",
          "sense": "device used in security systems",
          "tags": [
            "neuter"
          ],
          "word": "Bewegungsmelder"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "lang_code": "hu",
          "sense": "device used in security systems",
          "word": "mozgásérzékelő"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "lang_code": "ga",
          "sense": "device used in security systems",
          "tags": [
            "masculine"
          ],
          "word": "brathadóir gluaiseachta"
        },
        {
          "code": "it",
          "lang": "Italian",
          "lang_code": "it",
          "sense": "device used in security systems",
          "tags": [
            "masculine"
          ],
          "word": "sensore di movimento"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "lang_code": "ru",
          "roman": "detéktor dvižénija",
          "sense": "device used in security systems",
          "tags": [
            "masculine"
          ],
          "word": "дете́ктор движе́ния"
        }
      ]
    }
  ],
  "word": "motion detector"
}

{
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    {
      "form": "motion detectors",
      "tags": [
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      "expansion": "motion detector (plural motion detectors)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations",
        "Terms with Hungarian translations",
        "Terms with Irish translations",
        "Terms with Italian translations",
        "Terms with Mandarin translations",
        "Terms with Russian translations"
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      "examples": [
        {
          "bold_text_offsets": [
            [
              172,
              188
            ]
          ],
          "ref": "2026 February 27, Paul Salopek, “Hazard Cascade”, in National Geographic:",
          "text": "Higman and his sidekick, a geophysical engineering student named Krishna Divakarla from the Colorado School of Mines, are the volunteer cavalry. They are planting homemade motion detectors on the quivering slopes.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A device used in security systems that can alert the user of the presence of a moving object."
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "lang_code": "cmn",
      "roman": "dòngzuò gǎnyīngqì",
      "sense": "device used in security systems",
      "word": "動作感應器 /动作感应器"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "lang_code": "fi",
      "sense": "device used in security systems",
      "word": "liiketunnistin"
    },
    {
      "code": "de",
      "lang": "German",
      "lang_code": "de",
      "sense": "device used in security systems",
      "tags": [
        "neuter"
      ],
      "word": "Bewegungsmelder"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "lang_code": "hu",
      "sense": "device used in security systems",
      "word": "mozgásérzékelő"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "lang_code": "ga",
      "sense": "device used in security systems",
      "tags": [
        "masculine"
      ],
      "word": "brathadóir gluaiseachta"
    },
    {
      "code": "it",
      "lang": "Italian",
      "lang_code": "it",
      "sense": "device used in security systems",
      "tags": [
        "masculine"
      ],
      "word": "sensore di movimento"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "lang_code": "ru",
      "roman": "detéktor dvižénija",
      "sense": "device used in security systems",
      "tags": [
        "masculine"
      ],
      "word": "дете́ктор движе́ния"
    }
  ],
  "word": "motion detector"
}