"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": "30 70",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "19 81",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "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 lemmas",
    "Esperanto nouns",
    "Esperanto terms derived from English",
    "Esperanto terms derived from Italian",
    "Esperanto terms with IPA pronunciation",
    "Esperanto terms with audio pronunciation",
    "Pages with 1 entry",
    "Pages with entries",
    "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"
}