"grandma'am" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grand",
        "3": "ma'am"
      },
      "expansion": "grand- + ma'am",
      "name": "prefix"
    }
  ],
  "etymology_text": "grand- + ma'am",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "grandma'am",
      "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": "English terms prefixed with grand-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Female family members",
          "orig": "en:Female family members",
          "parents": [
            "Family members",
            "Female people",
            "Family",
            "Female",
            "People",
            "Gender",
            "Human",
            "Biology",
            "Psychology",
            "Sociology",
            "All topics",
            "Sciences",
            "Social sciences",
            "Fundamental",
            "Society"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The mother of one’s own mother."
      ],
      "id": "en-grandma'am-en-noun-We0xrNKF",
      "links": [
        [
          "mother",
          "mother"
        ]
      ],
      "raw_glosses": [
        "(archaic) The mother of one’s own mother."
      ],
      "synonyms": [
        {
          "word": "grandmother"
        }
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "grandma'am"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grand",
        "3": "ma'am"
      },
      "expansion": "grand- + ma'am",
      "name": "prefix"
    }
  ],
  "etymology_text": "grand- + ma'am",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "grandma'am",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms prefixed with grand-",
        "English terms with archaic senses",
        "en:Female family members"
      ],
      "glosses": [
        "The mother of one’s own mother."
      ],
      "links": [
        [
          "mother",
          "mother"
        ]
      ],
      "raw_glosses": [
        "(archaic) The mother of one’s own mother."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "grandmother"
    }
  ],
  "word": "grandma'am"
}