"zone isochrone" meaning in Français

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Traductions en occitan",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Français",
      "orig": "français",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Locution composée de zone et de isochrone"
  ],
  "forms": [
    {
      "form": "zones isochrones",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en français du marketing",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Zone géographique à l’intérieur de laquelle les individus se trouvent dans un intervalle de temps de déplacement donné d’un point de vente."
      ],
      "id": "fr-zone_isochrone-fr-noun-MoRFbT2u",
      "topics": [
        "marketing"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\zɔ.n‿i.zɔ.kʁɔn\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Occitan",
      "lang_code": "oc",
      "word": "zòna isocròna"
    }
  ],
  "word": "zone isochrone"
}

{
  "categories": [
    "Locutions nominales en français",
    "Traductions en occitan",
    "français"
  ],
  "etymology_texts": [
    "Locution composée de zone et de isochrone"
  ],
  "forms": [
    {
      "form": "zones isochrones",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Français",
  "lang_code": "fr",
  "pos": "noun",
  "pos_id": "fr-nom-1",
  "pos_title": "Locution nominale",
  "senses": [
    {
      "categories": [
        "Lexique en français du marketing"
      ],
      "glosses": [
        "Zone géographique à l’intérieur de laquelle les individus se trouvent dans un intervalle de temps de déplacement donné d’un point de vente."
      ],
      "topics": [
        "marketing"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\zɔ.n‿i.zɔ.kʁɔn\\"
    }
  ],
  "tags": [
    "feminine"
  ],
  "translations": [
    {
      "lang": "Occitan",
      "lang_code": "oc",
      "word": "zòna isocròna"
    }
  ],
  "word": "zone isochrone"
}