"a boca de noche" meaning in Spanish

{
  "head_templates": [
    {
      "args": {},
      "expansion": "a boca de noche",
      "name": "es-adv"
    }
  ],
  "hyphenation": [
    "a"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "at nightfall"
      ],
      "id": "en-a_boca_de_noche-es-adv-d8MJmM~j",
      "links": [
        [
          "nightfall",
          "nightfall"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/a ˌboka de ˈnot͡ʃe/"
    },
    {
      "ipa": "[a ˌβ̞o.ka ð̞e ˈno.t͡ʃe]"
    }
  ],
  "word": "a boca de noche"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "a boca de noche",
      "name": "es-adv"
    }
  ],
  "hyphenation": [
    "a"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish adverbs",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "at nightfall"
      ],
      "links": [
        [
          "nightfall",
          "nightfall"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/a ˌboka de ˈnot͡ʃe/"
    },
    {
      "ipa": "[a ˌβ̞o.ka ð̞e ˈno.t͡ʃe]"
    }
  ],
  "word": "a boca de noche"
}