"a. m." meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "ante meridiem",
        "4": "",
        "5": "before noon"
      },
      "expansion": "Latin ante meridiem (“before noon”)",
      "name": "bor"
    }
  ],
  "etymology_text": "Abbreviation of Latin ante meridiem (“before noon”).",
  "head_templates": [
    {
      "args": {
        "head": "a. m."
      },
      "expansion": "a. m.",
      "name": "es-adv"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "es",
          "name": "Time",
          "orig": "es:Time",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a.m."
      ],
      "id": "en-a._m.-es-adv-e0VfLdeR",
      "links": [
        [
          "a.m.",
          "a.m."
        ]
      ],
      "related": [
        {
          "word": "p. m."
        }
      ]
    }
  ],
  "word": "a. m."
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "ante meridiem",
        "4": "",
        "5": "before noon"
      },
      "expansion": "Latin ante meridiem (“before noon”)",
      "name": "bor"
    }
  ],
  "etymology_text": "Abbreviation of Latin ante meridiem (“before noon”).",
  "head_templates": [
    {
      "args": {
        "head": "a. m."
      },
      "expansion": "a. m.",
      "name": "es-adv"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "adv",
  "related": [
    {
      "word": "p. m."
    }
  ],
  "senses": [
    {
      "categories": [
        "Spanish adverbs",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish terms borrowed from Latin",
        "Spanish terms derived from Latin",
        "Spanish terms spelled with .",
        "es:Time"
      ],
      "glosses": [
        "a.m."
      ],
      "links": [
        [
          "a.m.",
          "a.m."
        ]
      ]
    }
  ],
  "word": "a. m."
}