"青信号" meaning in Japanese

{
  "forms": [
    {
      "form": "青信号",
      "ruby": [
        [
          "青",
          "あお"
        ],
        [
          "信",
          "しん"
        ],
        [
          "号",
          "ごう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "aoshingō",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "あおしんごう"
      },
      "expansion": "青(あお)信(しん)号(ごう) • (aoshingō)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "english": "red light",
          "roman": "akashingō",
          "ruby": [
            [
              "赤信号",
              "あかしんごう"
            ]
          ],
          "word": "赤信号"
        },
        {
          "english": "yellow light",
          "roman": "kishingō",
          "ruby": [
            [
              "黄信号",
              "きしんごう"
            ]
          ],
          "word": "黄信号"
        }
      ],
      "glosses": [
        "a green traffic light, a green light (abbr. 青), green signal"
      ],
      "id": "en-青信号-ja-noun-ENtQi2gx",
      "links": [
        [
          "green",
          "green"
        ],
        [
          "traffic light",
          "traffic light"
        ],
        [
          "green light",
          "green light"
        ],
        [
          "青",
          "青#Japanese"
        ],
        [
          "signal",
          "signal"
        ]
      ],
      "related": [
        {
          "english": "traffic light, the signalling device",
          "roman": "shingōki",
          "ruby": [
            [
              "信号機",
              "しんごうき"
            ]
          ],
          "word": "信号機"
        }
      ]
    }
  ],
  "word": "青信号"
}

{
  "coordinate_terms": [
    {
      "english": "red light",
      "roman": "akashingō",
      "ruby": [
        [
          "赤信号",
          "あかしんごう"
        ]
      ],
      "word": "赤信号"
    },
    {
      "english": "yellow light",
      "roman": "kishingō",
      "ruby": [
        [
          "黄信号",
          "きしんごう"
        ]
      ],
      "word": "黄信号"
    }
  ],
  "forms": [
    {
      "form": "青信号",
      "ruby": [
        [
          "青",
          "あお"
        ],
        [
          "信",
          "しん"
        ],
        [
          "号",
          "ごう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "aoshingō",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "あおしんごう"
      },
      "expansion": "青(あお)信(しん)号(ごう) • (aoshingō)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "related": [
    {
      "english": "traffic light, the signalling device",
      "roman": "shingōki",
      "ruby": [
        [
          "信号機",
          "しんごうき"
        ]
      ],
      "word": "信号機"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with three Han script characters"
      ],
      "glosses": [
        "a green traffic light, a green light (abbr. 青), green signal"
      ],
      "links": [
        [
          "green",
          "green"
        ],
        [
          "traffic light",
          "traffic light"
        ],
        [
          "green light",
          "green light"
        ],
        [
          "青",
          "青#Japanese"
        ],
        [
          "signal",
          "signal"
        ]
      ]
    }
  ],
  "word": "青信号"
}