"121" meaning in English

{
  "etymology_text": "One-to-one, with to replaced by the homophone two, with the words then replaced by numbers.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "121 (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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "One-to-one."
      ],
      "id": "en-121-en-adj-Y7O9iFsx",
      "links": [
        [
          "One-to-one",
          "one-to-one"
        ]
      ],
      "raw_glosses": [
        "(informal) One-to-one."
      ],
      "related": [
        {
          "word": "Strain 121"
        }
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    }
  ],
  "word": "121"
}

{
  "etymology_text": "One-to-one, with to replaced by the homophone two, with the words then replaced by numbers.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "121 (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "Strain 121"
    }
  ],
  "senses": [
    {
      "categories": [
        "English abbreviations",
        "English adjectives",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English palindromes",
        "English terms spelled with numbers",
        "English uncomparable adjectives",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "One-to-one."
      ],
      "links": [
        [
          "One-to-one",
          "one-to-one"
        ]
      ],
      "raw_glosses": [
        "(informal) One-to-one."
      ],
      "tags": [
        "informal",
        "not-comparable"
      ]
    }
  ],
  "word": "121"
}