"light waterline" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "light",
        "3": "waterline",
        "pos1": "adjective",
        "pos2": "noun",
        "t1": "lacking weight"
      },
      "expansion": "light (“lacking weight”, adjective) + waterline (noun)",
      "name": "affix"
    }
  ],
  "etymology_text": "From light (“lacking weight”, adjective) + waterline (noun).",
  "forms": [
    {
      "form": "light waterlines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "light waterline (plural light waterlines)",
      "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": "other",
          "name": "Pages using bad params when calling Template:R:Century 1914",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nautical",
          "orig": "en:Nautical",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The waterline at which a vessel floats when light or unladen."
      ],
      "id": "en-light_waterline-en-noun-z~kAqQW0",
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "waterline",
          "waterline"
        ],
        [
          "light",
          "light"
        ],
        [
          "unladen",
          "unladen"
        ]
      ],
      "raw_glosses": [
        "(nautical) The waterline at which a vessel floats when light or unladen."
      ],
      "related": [
        {
          "tags": [
            "noun"
          ],
          "word": "deep waterline"
        },
        {
          "tags": [
            "noun"
          ],
          "word": "light displacement"
        },
        {
          "tags": [
            "noun"
          ],
          "word": "load waterline"
        }
      ],
      "synonyms": [
        {
          "tags": [
            "noun"
          ],
          "word": "light line"
        },
        {
          "word": "light water line"
        }
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "word": "light waterline"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "light",
        "3": "waterline",
        "pos1": "adjective",
        "pos2": "noun",
        "t1": "lacking weight"
      },
      "expansion": "light (“lacking weight”, adjective) + waterline (noun)",
      "name": "affix"
    }
  ],
  "etymology_text": "From light (“lacking weight”, adjective) + waterline (noun).",
  "forms": [
    {
      "form": "light waterlines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "light waterline (plural light waterlines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "tags": [
        "noun"
      ],
      "word": "deep waterline"
    },
    {
      "tags": [
        "noun"
      ],
      "word": "light displacement"
    },
    {
      "tags": [
        "noun"
      ],
      "word": "load waterline"
    }
  ],
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages using bad params when calling Template:R:Century 1914",
        "en:Nautical"
      ],
      "glosses": [
        "The waterline at which a vessel floats when light or unladen."
      ],
      "links": [
        [
          "nautical",
          "nautical"
        ],
        [
          "waterline",
          "waterline"
        ],
        [
          "light",
          "light"
        ],
        [
          "unladen",
          "unladen"
        ]
      ],
      "raw_glosses": [
        "(nautical) The waterline at which a vessel floats when light or unladen."
      ],
      "topics": [
        "nautical",
        "transport"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "noun"
      ],
      "word": "light line"
    },
    {
      "word": "light water line"
    }
  ],
  "word": "light waterline"
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <pre> - omitted",
  "path": [
    "light waterline",
    "R:Century 1914",
    "#invoke",
    "#invoke",
    "Lua:checkparams:warn()",
    "extensionTag()"
  ],
  "section": "English",
  "subsection": "noun",
  "title": "light waterline",
  "trace": ""
}

{
  "called_from": "parserfns/156",
  "msg": "#tag creating non-allowed tag <pre> - omitted",
  "path": [
    "light waterline",
    "R:Century 1914",
    "#invoke",
    "#invoke",
    "Lua:checkparams:warn()",
    "frame:preprocess()",
    "#tag",
    "#tag"
  ],
  "section": "English",
  "subsection": "noun",
  "title": "light waterline",
  "trace": ""
}