"letero" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "it",
        "3": "lettera"
      },
      "expansion": "Italian lettera",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "en",
        "3": "letter"
      },
      "expansion": "English letter",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "litero"
      },
      "expansion": "Doublet of litero",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Italian lettera, English letter. Doublet of litero.",
  "forms": [
    {
      "form": "leteron",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "leteroj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "leterojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letero (accusative singular leteron, plural leteroj, accusative plural leterojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "le‧te‧ro"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "related": [
    {
      "_dis1": "0 0",
      "word": "leterbloko"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Esperanto BRO3",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "80 20",
          "kind": "topical",
          "langcode": "eo",
          "name": "Communication",
          "orig": "eo:Communication",
          "parents": [
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "The secretary typed and mailed 20 letters today.",
          "text": "La sekretario tajpis kaj sendis 20 leterojn hodiaŭ.",
          "type": "example"
        }
      ],
      "glosses": [
        "letter (written message)"
      ],
      "id": "en-letero-eo-noun-JbLk0dW0",
      "links": [
        [
          "letter",
          "letter"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "35 65",
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "18 82",
          "kind": "other",
          "name": "Esperanto entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "missive (formal)"
      ],
      "id": "en-letero-eo-noun-KwOSvWeG",
      "links": [
        [
          "missive",
          "missive"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[leˈtero]"
    },
    {
      "rhymes": "-ero"
    }
  ],
  "word": "letero"
}

{
  "categories": [
    "Esperanto BRO3",
    "Esperanto doublets",
    "Esperanto entries with incorrect language header",
    "Esperanto entries with topic categories using raw markup",
    "Esperanto lemmas",
    "Esperanto nouns",
    "Esperanto terms derived from English",
    "Esperanto terms derived from Italian",
    "Esperanto terms with IPA pronunciation",
    "Esperanto terms with audio links",
    "Rhymes:Esperanto/ero",
    "eo:Communication"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "it",
        "3": "lettera"
      },
      "expansion": "Italian lettera",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "en",
        "3": "letter"
      },
      "expansion": "English letter",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "litero"
      },
      "expansion": "Doublet of litero",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Italian lettera, English letter. Doublet of litero.",
  "forms": [
    {
      "form": "leteron",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "leteroj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "leterojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letero (accusative singular leteron, plural leteroj, accusative plural leterojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "le‧te‧ro"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "related": [
    {
      "word": "leterbloko"
    }
  ],
  "senses": [
    {
      "categories": [
        "Esperanto terms with usage examples"
      ],
      "examples": [
        {
          "english": "The secretary typed and mailed 20 letters today.",
          "text": "La sekretario tajpis kaj sendis 20 leterojn hodiaŭ.",
          "type": "example"
        }
      ],
      "glosses": [
        "letter (written message)"
      ],
      "links": [
        [
          "letter",
          "letter"
        ]
      ]
    },
    {
      "glosses": [
        "missive (formal)"
      ],
      "links": [
        [
          "missive",
          "missive"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[leˈtero]"
    },
    {
      "rhymes": "-ero"
    }
  ],
  "word": "letero"
}