"flat lock" meaning in English

{
  "forms": [
    {
      "form": "flat locks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flat lock (plural flat locks)",
      "name": "en-noun"
    }
  ],
  "hyphenation": [
    "flat"
  ],
  "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": [
        "a method of interlocking metal panels in which one panel edge is folded back on top of itself and the other panel is folded under, after which the two panels are hooked together."
      ],
      "hypernyms": [
        {
          "word": "lock"
        }
      ],
      "id": "en-flat_lock-en-noun-XtLWEwmb",
      "links": [
        [
          "construction",
          "construction"
        ],
        [
          "interlocking",
          "interlocking"
        ]
      ],
      "raw_glosses": [
        "(construction) a method of interlocking metal panels in which one panel edge is folded back on top of itself and the other panel is folded under, after which the two panels are hooked together."
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/flat lɒk/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "flat lock"
}

{
  "forms": [
    {
      "form": "flat locks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flat lock (plural flat locks)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "lock"
    }
  ],
  "hyphenation": [
    "flat"
  ],
  "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",
        "English terms with IPA pronunciation",
        "en:Construction"
      ],
      "glosses": [
        "a method of interlocking metal panels in which one panel edge is folded back on top of itself and the other panel is folded under, after which the two panels are hooked together."
      ],
      "links": [
        [
          "construction",
          "construction"
        ],
        [
          "interlocking",
          "interlocking"
        ]
      ],
      "raw_glosses": [
        "(construction) a method of interlocking metal panels in which one panel edge is folded back on top of itself and the other panel is folded under, after which the two panels are hooked together."
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/flat lɒk/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "flat lock"
}