"smell trap" meaning in English

{
  "forms": [
    {
      "form": "smell traps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "smell trap (plural smell traps)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Construction",
          "orig": "en:Construction",
          "parents": [
            "Architecture",
            "Engineering",
            "Applied sciences",
            "Art",
            "Technology",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of stench trap"
      ],
      "id": "en-smell_trap-en-noun-LEMmEh-w",
      "links": [
        [
          "construction",
          "construction"
        ],
        [
          "stench trap",
          "stench trap#English"
        ]
      ],
      "raw_glosses": [
        "(construction, plumbing) Synonym of stench trap"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "stench trap"
        }
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing",
        "plumbing"
      ]
    }
  ],
  "word": "smell trap"
}

{
  "forms": [
    {
      "form": "smell traps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "smell trap (plural smell traps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Construction"
      ],
      "glosses": [
        "Synonym of stench trap"
      ],
      "links": [
        [
          "construction",
          "construction"
        ],
        [
          "stench trap",
          "stench trap#English"
        ]
      ],
      "raw_glosses": [
        "(construction, plumbing) Synonym of stench trap"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "stench trap"
        }
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing",
        "plumbing"
      ]
    }
  ],
  "word": "smell trap"
}