"çò melhor" meaning in Occitan

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en occitan",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions adverbiales en occitan",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Occitan en graphie normalisée",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Occitan",
      "orig": "occitan",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de çò et de melhor."
  ],
  "lang": "Occitan",
  "lang_code": "oc",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "raw_tags": [
    "graphie normalisée"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en occitan",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              57,
              66
            ]
          ],
          "ref": "Cristian Laus, Joan Delcaire, 2003  ^([1])",
          "text": "Vos calrà venir un ser. Avètz pas qu’a telefonar. Òc, es çò melhor, telefonatz.",
          "translation": "Il nous faudra venir un soir. Vous n’avez qu’à téléphoner. Oui, c’est le mieux, téléphonez"
        }
      ],
      "glosses": [
        "Le mieux, superlatif de bien."
      ],
      "id": "fr-çò_melhor-oc-adv-QQshliwP"
    }
  ],
  "sounds": [
    {
      "ipa": "\\sɔ me.ˈʎu\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "çò melhor"
}

{
  "categories": [
    "Compositions en occitan",
    "Locutions adverbiales en occitan",
    "Occitan en graphie normalisée",
    "occitan"
  ],
  "etymology_texts": [
    "Composé de çò et de melhor."
  ],
  "lang": "Occitan",
  "lang_code": "oc",
  "pos": "adv",
  "pos_title": "Locution adverbiale",
  "raw_tags": [
    "graphie normalisée"
  ],
  "senses": [
    {
      "categories": [
        "Exemples en occitan"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              57,
              66
            ]
          ],
          "ref": "Cristian Laus, Joan Delcaire, 2003  ^([1])",
          "text": "Vos calrà venir un ser. Avètz pas qu’a telefonar. Òc, es çò melhor, telefonatz.",
          "translation": "Il nous faudra venir un soir. Vous n’avez qu’à téléphoner. Oui, c’est le mieux, téléphonez"
        }
      ],
      "glosses": [
        "Le mieux, superlatif de bien."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\sɔ me.ˈʎu\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "çò melhor"
}