"устар." meaning in Russian

{
  "forms": [
    {
      "form": "ustar.",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "устар. • (ustar.)",
      "name": "ru-adj"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "ustarévšeje, “obsolete, antiquated”",
          "word": "устаре́вшее"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of устаре́вшее (ustarévšeje, “obsolete, antiquated”)."
      ],
      "id": "en-устар.-ru-adj-lKBrD3oG",
      "links": [
        [
          "устаре́вшее",
          "устаревший#Russian"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "устар."
}

{
  "forms": [
    {
      "form": "ustar.",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "устар. • (ustar.)",
      "name": "ru-adj"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "ustarévšeje, “obsolete, antiquated”",
          "word": "устаре́вшее"
        }
      ],
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for accents in Russian entries",
        "Russian abbreviations",
        "Russian adjectives",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian terms spelled with .",
        "Russian terms with redundant head parameter"
      ],
      "glosses": [
        "Abbreviation of устаре́вшее (ustarévšeje, “obsolete, antiquated”)."
      ],
      "links": [
        [
          "устаре́вшее",
          "устаревший#Russian"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "устар."
}