"justar" meaning in Ancien occitan

{
  "categories": [
    {
      "kind": "other",
      "name": "Verbes en ancien occitan",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien occitan",
      "orig": "ancien occitan",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Ancien occitan",
  "lang_code": "pro",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "alt_of": [
        {
          "word": "jostar"
        }
      ],
      "glosses": [
        "Variante de jostar."
      ],
      "id": "fr-justar-pro-verb-fk5V0bzR",
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "justar"
}

{
  "categories": [
    "Verbes en ancien occitan",
    "ancien occitan"
  ],
  "lang": "Ancien occitan",
  "lang_code": "pro",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "alt_of": [
        {
          "word": "jostar"
        }
      ],
      "glosses": [
        "Variante de jostar."
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "justar"
}