"eyes-only" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "eyes-only"
      },
      "expansion": "eyes-only (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Espionage",
          "orig": "en:Espionage",
          "parents": [
            "Deception",
            "Secrecy",
            "Security",
            "Ethics",
            "Human behaviour",
            "Society",
            "Philosophy",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "ears-only"
        }
      ],
      "glosses": [
        "Meant to be read only, and not discussed, by the named recipient; classified."
      ],
      "id": "en-eyes-only-en-adj-0tn61IR6",
      "links": [
        [
          "espionage",
          "espionage"
        ],
        [
          "classified",
          "classified"
        ]
      ],
      "raw_glosses": [
        "(espionage, of documents) Meant to be read only, and not discussed, by the named recipient; classified."
      ],
      "raw_tags": [
        "of documents"
      ],
      "related": [
        {
          "word": "need-to-know"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "espionage",
        "government",
        "military",
        "politics",
        "war"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "only in writing, not in speech",
          "word": "vain silmille"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "only in writing, not in speech",
          "word": "classé"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "tólʹko líčno",
          "sense": "only in writing, not in speech",
          "word": "то́лько ли́чно"
        }
      ]
    }
  ],
  "word": "eyes-only"
}

{
  "coordinate_terms": [
    {
      "word": "ears-only"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "eyes-only"
      },
      "expansion": "eyes-only (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "need-to-know"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English uncomparable adjectives",
        "en:Espionage"
      ],
      "glosses": [
        "Meant to be read only, and not discussed, by the named recipient; classified."
      ],
      "links": [
        [
          "espionage",
          "espionage"
        ],
        [
          "classified",
          "classified"
        ]
      ],
      "raw_glosses": [
        "(espionage, of documents) Meant to be read only, and not discussed, by the named recipient; classified."
      ],
      "raw_tags": [
        "of documents"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "espionage",
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "only in writing, not in speech",
      "word": "vain silmille"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "only in writing, not in speech",
      "word": "classé"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "tólʹko líčno",
      "sense": "only in writing, not in speech",
      "word": "то́лько ли́чно"
    }
  ],
  "word": "eyes-only"
}