"7ed" meaning in Welsh

{
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "adjective"
      },
      "expansion": "7ed",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "7fed"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Nonstandard spelling of 7fed."
      ],
      "id": "en-7ed-cy-adj-BvAbuCce",
      "links": [
        [
          "7fed",
          "7fed#Welsh"
        ]
      ],
      "tags": [
        "alt-of",
        "nonstandard"
      ]
    }
  ],
  "word": "7ed"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "adjective"
      },
      "expansion": "7ed",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "7fed"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Welsh adjectives",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh nonstandard forms",
        "Welsh terms spelled with numbers"
      ],
      "glosses": [
        "Nonstandard spelling of 7fed."
      ],
      "links": [
        [
          "7fed",
          "7fed#Welsh"
        ]
      ],
      "tags": [
        "alt-of",
        "nonstandard"
      ]
    }
  ],
  "word": "7ed"
}