"letterboard" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "letter",
        "3": "board"
      },
      "expansion": "letter + board",
      "name": "compound"
    }
  ],
  "etymology_text": "From letter + board.",
  "forms": [
    {
      "form": "letterboards",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letterboard (plural letterboards)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1941, Transit Journal: Volume 85:",
          "text": "So reads the new slogan painted on the letterboards of New York City omnibuses.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A signboard for lettering or text."
      ],
      "id": "en-letterboard-en-noun-BZlff30I",
      "links": [
        [
          "signboard",
          "signboard"
        ],
        [
          "lettering",
          "lettering"
        ],
        [
          "text",
          "text"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "1 58 41",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "2 58 40",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "2 58 40",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1973, Oliver Sacks, Awakenings:",
          "text": "One of the patients, Leonard L., when he heard of L-DOPA, rapped on his letterboard with mixed enthusiasm and irony, 'Dopamine is Resurrectamine. Cotzias is the Chemical Messiah.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "A board marked with letters of the alphabet, used for communication by the disabled."
      ],
      "id": "en-letterboard-en-noun-v~BDt2Ri",
      "links": [
        [
          "board",
          "board"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ],
        [
          "communication",
          "communication"
        ],
        [
          "disabled",
          "disabled"
        ]
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Printing",
          "orig": "en:Printing",
          "parents": [
            "Industries",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A board on which matter in type is placed for storage or manipulation."
      ],
      "id": "en-letterboard-en-noun-Bs4wL7Lu",
      "links": [
        [
          "printing",
          "printing#Noun"
        ]
      ],
      "raw_glosses": [
        "(printing, historical) A board on which matter in type is placed for storage or manipulation."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "media",
        "printing",
        "publishing"
      ]
    }
  ],
  "word": "letterboard"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "letter",
        "3": "board"
      },
      "expansion": "letter + board",
      "name": "compound"
    }
  ],
  "etymology_text": "From letter + board.",
  "forms": [
    {
      "form": "letterboards",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letterboard (plural letterboards)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1941, Transit Journal: Volume 85:",
          "text": "So reads the new slogan painted on the letterboards of New York City omnibuses.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A signboard for lettering or text."
      ],
      "links": [
        [
          "signboard",
          "signboard"
        ],
        [
          "lettering",
          "lettering"
        ],
        [
          "text",
          "text"
        ]
      ]
    },
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1973, Oliver Sacks, Awakenings:",
          "text": "One of the patients, Leonard L., when he heard of L-DOPA, rapped on his letterboard with mixed enthusiasm and irony, 'Dopamine is Resurrectamine. Cotzias is the Chemical Messiah.'",
          "type": "quote"
        }
      ],
      "glosses": [
        "A board marked with letters of the alphabet, used for communication by the disabled."
      ],
      "links": [
        [
          "board",
          "board"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ],
        [
          "communication",
          "communication"
        ],
        [
          "disabled",
          "disabled"
        ]
      ]
    },
    {
      "categories": [
        "English terms with historical senses",
        "en:Printing"
      ],
      "glosses": [
        "A board on which matter in type is placed for storage or manipulation."
      ],
      "links": [
        [
          "printing",
          "printing#Noun"
        ]
      ],
      "raw_glosses": [
        "(printing, historical) A board on which matter in type is placed for storage or manipulation."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "media",
        "printing",
        "publishing"
      ]
    }
  ],
  "word": "letterboard"
}