"aa" meaning in Estonian

{
  "head_templates": [
    {
      "args": {
        "1": "et",
        "2": "interjection"
      },
      "expansion": "aa",
      "name": "head"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "intj",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "english": "Oh, it's you.",
          "text": "Aa, see oled sina.",
          "type": "example"
        }
      ],
      "glosses": [
        "An interjection expressing recognition -"
      ],
      "id": "en-aa-et-intj-cNnzwenP"
    },
    {
      "categories": [
        {
          "_dis": "30 53 17",
          "kind": "other",
          "name": "Estonian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "Ah, I understand.",
          "text": "Aa, saan aru.",
          "type": "example"
        }
      ],
      "glosses": [
        "An interjection expressing understanding -"
      ],
      "id": "en-aa-et-intj-HIN1IVuf"
    }
  ],
  "word": "aa"
}

{
  "forms": [
    {
      "form": "aa",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "aad",
      "tags": [
        "partitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "et",
        "10": "",
        "2": "nouns",
        "3": "genitive",
        "4": "aa",
        "5": "",
        "6": "",
        "7": "partitive",
        "8": "aad",
        "9": "",
        "cat2": "",
        "f1accel-form": "gen|s",
        "f1request": "1",
        "f2accel-form": "gen|s",
        "f3accel-form": "par|s",
        "f3request": "1",
        "f4accel-form": "par|s",
        "head": ""
      },
      "expansion": "aa (genitive aa, partitive aad)",
      "name": "head"
    },
    {
      "args": {
        "1": "aa",
        "2": "aad"
      },
      "expansion": "aa (genitive aa, partitive aad)",
      "name": "et-noun"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "et",
          "name": "Latin letter names",
          "orig": "et:Latin letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The name of the Latin-script letter A/a."
      ],
      "id": "en-aa-et-noun-MlIJrx~w",
      "links": [
        [
          "A",
          "A#Estonian"
        ],
        [
          "a",
          "a#Estonian"
        ]
      ]
    }
  ],
  "word": "aa"
}

{
  "categories": [
    "Estonian entries with incorrect language header",
    "Estonian interjections",
    "Estonian lemmas",
    "Estonian nouns",
    "Pages with 42 entries",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "et",
        "2": "interjection"
      },
      "expansion": "aa",
      "name": "head"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "Estonian terms with usage examples"
      ],
      "examples": [
        {
          "english": "Oh, it's you.",
          "text": "Aa, see oled sina.",
          "type": "example"
        }
      ],
      "glosses": [
        "An interjection expressing recognition -"
      ]
    },
    {
      "categories": [
        "Estonian terms with usage examples"
      ],
      "examples": [
        {
          "english": "Ah, I understand.",
          "text": "Aa, saan aru.",
          "type": "example"
        }
      ],
      "glosses": [
        "An interjection expressing understanding -"
      ]
    }
  ],
  "word": "aa"
}

{
  "categories": [
    "Estonian entries with incorrect language header",
    "Estonian interjections",
    "Estonian lemmas",
    "Estonian nouns",
    "Pages with 42 entries",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "aa",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "aad",
      "tags": [
        "partitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "et",
        "10": "",
        "2": "nouns",
        "3": "genitive",
        "4": "aa",
        "5": "",
        "6": "",
        "7": "partitive",
        "8": "aad",
        "9": "",
        "cat2": "",
        "f1accel-form": "gen|s",
        "f1request": "1",
        "f2accel-form": "gen|s",
        "f3accel-form": "par|s",
        "f3request": "1",
        "f4accel-form": "par|s",
        "head": ""
      },
      "expansion": "aa (genitive aa, partitive aad)",
      "name": "head"
    },
    {
      "args": {
        "1": "aa",
        "2": "aad"
      },
      "expansion": "aa (genitive aa, partitive aad)",
      "name": "et-noun"
    }
  ],
  "lang": "Estonian",
  "lang_code": "et",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "et:Latin letter names"
      ],
      "glosses": [
        "The name of the Latin-script letter A/a."
      ],
      "links": [
        [
          "A",
          "A#Estonian"
        ],
        [
          "a",
          "a#Estonian"
        ]
      ]
    }
  ],
  "word": "aa"
}