"λῆμμα" meaning in Greco antico

{
  "categories": [
    {
      "kind": "other",
      "name": "Sostantivi in greco antico",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Greco antico",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "dono"
      ],
      "id": "it-λῆμμα-grc-noun-xgZbVsxW"
    },
    {
      "glosses": [
        "premessa"
      ],
      "id": "it-λῆμμα-grc-noun-1xXGJGPl"
    }
  ],
  "word": "λῆμμα"
}

{
  "categories": [
    "Sostantivi in greco antico"
  ],
  "lang": "Greco antico",
  "lang_code": "grc",
  "pos": "noun",
  "pos_title": "Sostantivo",
  "senses": [
    {
      "glosses": [
        "dono"
      ]
    },
    {
      "glosses": [
        "premessa"
      ]
    }
  ],
  "word": "λῆμμα"
}