"dialect levelling" meaning in English

{
  "forms": [
    {
      "form": "dialect levellings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "+"
      },
      "expansion": "dialect levelling (usually uncountable, plural dialect levellings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Dutch translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Korean translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Spanish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Linguistics",
          "orig": "en:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the reduction of dialectal diversity within a language due to the propagation of a single prestige variety"
      ],
      "id": "en-dialect_levelling-en-noun-Zy32-Mge",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "reduction",
          "reduction"
        ],
        [
          "dialect",
          "dialect"
        ],
        [
          "diversity",
          "diversity"
        ],
        [
          "language",
          "language"
        ],
        [
          "propagation",
          "propagation"
        ],
        [
          "single",
          "single"
        ],
        [
          "prestige",
          "prestige"
        ],
        [
          "variety",
          "variety"
        ]
      ],
      "raw_glosses": [
        "(linguistics) the reduction of dialectal diversity within a language due to the propagation of a single prestige variety"
      ],
      "synonyms": [
        {
          "tags": [
            "US"
          ],
          "word": "dialect leveling"
        }
      ],
      "tags": [
        "uncountable",
        "usually"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "dialect levelling",
          "word": "dialectnivellering"
        },
        {
          "alt": "方言平準化",
          "code": "ko",
          "lang": "Korean",
          "roman": "bang'eonpyeongjunhwa",
          "sense": "dialect levelling",
          "word": "방언평준화"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "dialect levelling",
          "word": "nivelación lingüística"
        }
      ],
      "wikipedia": [
        "dialect levelling"
      ]
    }
  ],
  "word": "dialect levelling"
}

{
  "forms": [
    {
      "form": "dialect levellings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "+"
      },
      "expansion": "dialect levelling (usually uncountable, plural dialect levellings)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Dutch translations",
        "Terms with Korean translations",
        "Terms with Spanish translations",
        "en:Linguistics"
      ],
      "glosses": [
        "the reduction of dialectal diversity within a language due to the propagation of a single prestige variety"
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "reduction",
          "reduction"
        ],
        [
          "dialect",
          "dialect"
        ],
        [
          "diversity",
          "diversity"
        ],
        [
          "language",
          "language"
        ],
        [
          "propagation",
          "propagation"
        ],
        [
          "single",
          "single"
        ],
        [
          "prestige",
          "prestige"
        ],
        [
          "variety",
          "variety"
        ]
      ],
      "raw_glosses": [
        "(linguistics) the reduction of dialectal diversity within a language due to the propagation of a single prestige variety"
      ],
      "tags": [
        "uncountable",
        "usually"
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "sciences"
      ],
      "wikipedia": [
        "dialect levelling"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "US"
      ],
      "word": "dialect leveling"
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "dialect levelling",
      "word": "dialectnivellering"
    },
    {
      "alt": "方言平準化",
      "code": "ko",
      "lang": "Korean",
      "roman": "bang'eonpyeongjunhwa",
      "sense": "dialect levelling",
      "word": "방언평준화"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "dialect levelling",
      "word": "nivelación lingüística"
    }
  ],
  "word": "dialect levelling"
}