"кэй" meaning in Russian

{
  "forms": [
    {
      "form": "kɛj",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "кэй",
        "2": "n-in",
        "3": "-"
      },
      "expansion": "кэй • (kɛj) n inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "ru",
          "name": "Latin letter names",
          "orig": "ru:Latin letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "K, k"
      ],
      "id": "en-кэй-ru-noun-PXBCpxx~",
      "links": [
        [
          "K",
          "K"
        ],
        [
          "k",
          "k"
        ]
      ],
      "raw_glosses": [
        "(English letter) K, k"
      ],
      "tags": [
        "English",
        "indeclinable",
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[kɛj]"
    }
  ],
  "word": "кэй"
}

{
  "forms": [
    {
      "form": "kɛj",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "кэй",
        "2": "n-in",
        "3": "-"
      },
      "expansion": "кэй • (kɛj) n inan (indeclinable)",
      "name": "ru-noun"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Russian 1-syllable words",
        "Russian entries with incorrect language header",
        "Russian inanimate nouns",
        "Russian indeclinable nouns",
        "Russian lemmas",
        "Russian neuter nouns",
        "Russian nouns",
        "Russian terms with IPA pronunciation",
        "Russian terms with redundant head parameter",
        "ru:Latin letter names"
      ],
      "glosses": [
        "K, k"
      ],
      "links": [
        [
          "K",
          "K"
        ],
        [
          "k",
          "k"
        ]
      ],
      "raw_glosses": [
        "(English letter) K, k"
      ],
      "tags": [
        "English",
        "indeclinable",
        "letter"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[kɛj]"
    }
  ],
  "word": "кэй"
}