"courtesy light" meaning in English

{
  "forms": [
    {
      "form": "courtesy lights",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "courtesy light (plural courtesy lights)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Automotive",
          "orig": "en:Automotive",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Light sources",
          "orig": "en:Light sources",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A small light inside a motor vehicle that automatically switches on when a door is opened."
      ],
      "id": "en-courtesy_light-en-noun-7N4YhHvw",
      "links": [
        [
          "automotive",
          "automotive"
        ]
      ],
      "raw_glosses": [
        "(automotive) A small light inside a motor vehicle that automatically switches on when a door is opened."
      ],
      "synonyms": [
        {
          "word": "courtesy lamp"
        }
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "courtesy light"
}

{
  "forms": [
    {
      "form": "courtesy lights",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "courtesy light (plural courtesy lights)",
      "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",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Automotive",
        "en:Light sources"
      ],
      "glosses": [
        "A small light inside a motor vehicle that automatically switches on when a door is opened."
      ],
      "links": [
        [
          "automotive",
          "automotive"
        ]
      ],
      "raw_glosses": [
        "(automotive) A small light inside a motor vehicle that automatically switches on when a door is opened."
      ],
      "synonyms": [
        {
          "word": "courtesy lamp"
        }
      ],
      "topics": [
        "automotive",
        "transport",
        "vehicles"
      ]
    }
  ],
  "word": "courtesy light"
}