"exhaust purifier" meaning in English

{
  "forms": [
    {
      "form": "exhaust purifiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "exhaust purifier (plural exhaust purifiers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "name": "Terms with Estonian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A device to filter exhaust gases."
      ],
      "id": "en-exhaust_purifier-en-noun-JBeINgLT",
      "links": [
        [
          "exhaust gas",
          "exhaust gas"
        ]
      ],
      "related": [
        {
          "word": "diesel particulate filter"
        }
      ],
      "translations": [
        {
          "code": "et",
          "lang": "Estonian",
          "sense": "device to filter exhaust gases",
          "word": "õhufilter"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "device to filter exhaust gases",
          "word": "pakokaasunpuhdistin"
        }
      ]
    }
  ],
  "word": "exhaust purifier"
}

{
  "forms": [
    {
      "form": "exhaust purifiers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "exhaust purifier (plural exhaust purifiers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "diesel particulate filter"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Estonian translations",
        "Terms with Finnish translations"
      ],
      "glosses": [
        "A device to filter exhaust gases."
      ],
      "links": [
        [
          "exhaust gas",
          "exhaust gas"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "et",
      "lang": "Estonian",
      "sense": "device to filter exhaust gases",
      "word": "õhufilter"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "device to filter exhaust gases",
      "word": "pakokaasunpuhdistin"
    }
  ],
  "word": "exhaust purifier"
}