"roof curb" meaning in English

{
  "forms": [
    {
      "form": "roof curbs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "roof curb (plural roof curbs)",
      "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": "Roofing",
          "orig": "en:Roofing",
          "parents": [
            "Construction",
            "Architecture",
            "Engineering",
            "Applied sciences",
            "Art",
            "Technology",
            "Sciences",
            "Culture",
            "All topics",
            "Society",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof."
      ],
      "id": "en-roof_curb-en-noun-iO8U2ur2",
      "links": [
        [
          "roofing",
          "roofing#Noun"
        ],
        [
          "frame",
          "frame"
        ],
        [
          "mount",
          "mount"
        ],
        [
          "air conditioning",
          "air conditioning"
        ],
        [
          "skylight",
          "skylight"
        ]
      ],
      "raw_glosses": [
        "(roofing) A raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof."
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing",
        "roofing"
      ]
    }
  ],
  "word": "roof curb"
}

{
  "forms": [
    {
      "form": "roof curbs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "roof curb (plural roof curbs)",
      "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:Roofing"
      ],
      "glosses": [
        "A raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof."
      ],
      "links": [
        [
          "roofing",
          "roofing#Noun"
        ],
        [
          "frame",
          "frame"
        ],
        [
          "mount",
          "mount"
        ],
        [
          "air conditioning",
          "air conditioning"
        ],
        [
          "skylight",
          "skylight"
        ]
      ],
      "raw_glosses": [
        "(roofing) A raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof."
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing",
        "roofing"
      ]
    }
  ],
  "word": "roof curb"
}