"letter column" meaning in English

{
  "forms": [
    {
      "form": "letter columns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letter column (plural letter columns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "lettercol"
        }
      ],
      "examples": [
        {
          "ref": "1958, Ralph Merridette Holland, Ghu's Lexicon, page 3:",
          "text": "A prozine without a letter column is a fakezine, and no trufan will buy one.",
          "type": "quote"
        },
        {
          "ref": "2000, Michael Ashley, The History of the Science Fiction Magazine, volume 1, →ISBN, page 53:",
          "text": "Gernsback's second response to his readership was to establish a letter column, called 'Discussions', which became a regular feature from the January 1927 issue.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A section of a periodical in which readers' letters are published."
      ],
      "id": "en-letter_column-en-noun-vxvuZJZ4",
      "links": [
        [
          "section",
          "section"
        ],
        [
          "periodical",
          "periodical"
        ],
        [
          "reader",
          "reader"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "published",
          "published"
        ]
      ],
      "meronyms": [
        {
          "word": "letter to the editor"
        },
        {
          "word": "letter of comment"
        }
      ],
      "translations": [
        {
          "code": "de",
          "lang": "German",
          "sense": "section",
          "tags": [
            "feminine"
          ],
          "word": "Leserbriefspalte"
        }
      ]
    }
  ],
  "word": "letter column"
}

{
  "derived": [
    {
      "word": "lettercol"
    }
  ],
  "forms": [
    {
      "form": "letter columns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "letter column (plural letter columns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "meronyms": [
    {
      "word": "letter to the editor"
    },
    {
      "word": "letter of comment"
    }
  ],
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with German translations"
      ],
      "examples": [
        {
          "ref": "1958, Ralph Merridette Holland, Ghu's Lexicon, page 3:",
          "text": "A prozine without a letter column is a fakezine, and no trufan will buy one.",
          "type": "quote"
        },
        {
          "ref": "2000, Michael Ashley, The History of the Science Fiction Magazine, volume 1, →ISBN, page 53:",
          "text": "Gernsback's second response to his readership was to establish a letter column, called 'Discussions', which became a regular feature from the January 1927 issue.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A section of a periodical in which readers' letters are published."
      ],
      "links": [
        [
          "section",
          "section"
        ],
        [
          "periodical",
          "periodical"
        ],
        [
          "reader",
          "reader"
        ],
        [
          "letter",
          "letter"
        ],
        [
          "published",
          "published"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "de",
      "lang": "German",
      "sense": "section",
      "tags": [
        "feminine"
      ],
      "word": "Leserbriefspalte"
    }
  ],
  "word": "letter column"
}