"chevax" meaning in Ancien français

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de noms communs en ancien français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien français",
      "orig": "ancien français",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "examples": [
        {
          "ref": "Chanson des quatre fils Aymon, ca XIIe siècle, transcription de Ferdinand Castets, 1909",
          "text": "De Paris s’en issirent sur les chevax armez."
        }
      ],
      "form_of": [
        {
          "word": "cheval"
        }
      ],
      "glosses": [
        "Pluriel du cas régime de cheval."
      ],
      "id": "fr-chevax-fro-noun-9M3ASpVm"
    },
    {
      "form_of": [
        {
          "word": "cheval"
        }
      ],
      "glosses": [
        "Cas sujet singulier de cheval."
      ],
      "id": "fr-chevax-fro-noun-UVh2ErFp"
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "chevax"
}

{
  "categories": [
    "Formes de noms communs en ancien français",
    "ancien français"
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "noun",
  "pos_title": "Forme de nom commun",
  "senses": [
    {
      "examples": [
        {
          "ref": "Chanson des quatre fils Aymon, ca XIIe siècle, transcription de Ferdinand Castets, 1909",
          "text": "De Paris s’en issirent sur les chevax armez."
        }
      ],
      "form_of": [
        {
          "word": "cheval"
        }
      ],
      "glosses": [
        "Pluriel du cas régime de cheval."
      ]
    },
    {
      "form_of": [
        {
          "word": "cheval"
        }
      ],
      "glosses": [
        "Cas sujet singulier de cheval."
      ]
    }
  ],
  "tags": [
    "form-of",
    "masculine"
  ],
  "word": "chevax"
}