"ears-only" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "ears-only"
      },
      "expansion": "ears-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": "eyes-only"
        }
      ],
      "glosses": [
        "Too secret to be put in writing; only to be transmitted orally."
      ],
      "id": "en-ears-only-en-adj-D6LVhjwK",
      "links": [
        [
          "espionage",
          "espionage"
        ]
      ],
      "raw_glosses": [
        "(espionage) Too secret to be put in writing; only to be transmitted orally."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "espionage",
        "government",
        "military",
        "politics",
        "war"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "only transmitted orally",
          "word": "vain korville"
        }
      ]
    }
  ],
  "word": "ears-only"
}

{
  "coordinate_terms": [
    {
      "word": "eyes-only"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "head": "ears-only"
      },
      "expansion": "ears-only (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English uncomparable adjectives",
        "en:Espionage"
      ],
      "glosses": [
        "Too secret to be put in writing; only to be transmitted orally."
      ],
      "links": [
        [
          "espionage",
          "espionage"
        ]
      ],
      "raw_glosses": [
        "(espionage) Too secret to be put in writing; only to be transmitted orally."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "espionage",
        "government",
        "military",
        "politics",
        "war"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "only transmitted orally",
      "word": "vain korville"
    }
  ],
  "word": "ears-only"
}