"chain shift" meaning in English

{
  "forms": [
    {
      "form": "chain shifts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "chain shift (plural chain shifts)",
      "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": "topical",
          "langcode": "en",
          "name": "Linguistics",
          "orig": "en:Linguistics",
          "parents": [
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Phonology",
          "orig": "en:Phonology",
          "parents": [
            "Linguistics",
            "Language",
            "Social sciences",
            "Communication",
            "Sciences",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, →DOI, page 10",
          "text": "Many non-Antipodeans cannot readily distinguish Australian and New Zealand English, because the phonologies basically overlap with the exception of an upwards chain shift in the front vowels.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A phonological modification of a vowel system in which a change in a particular vowel causes other adjacent vowels to also change in order to avoid vowel mergers."
      ],
      "id": "en-chain_shift-en-noun-WK~U3QT7",
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "phonology",
          "phonology"
        ],
        [
          "change",
          "change"
        ],
        [
          "vowel",
          "vowel"
        ],
        [
          "adjacent",
          "adjacent"
        ],
        [
          "merger",
          "merger"
        ]
      ],
      "raw_glosses": [
        "(linguistics, phonology) A phonological modification of a vowel system in which a change in a particular vowel causes other adjacent vowels to also change in order to avoid vowel mergers."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonology",
        "sciences"
      ]
    }
  ],
  "word": "chain shift"
}

{
  "forms": [
    {
      "form": "chain shifts",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "chain shift (plural chain shifts)",
      "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 terms with quotations",
        "en:Linguistics",
        "en:Phonology"
      ],
      "examples": [
        {
          "ref": "2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, →DOI, page 10",
          "text": "Many non-Antipodeans cannot readily distinguish Australian and New Zealand English, because the phonologies basically overlap with the exception of an upwards chain shift in the front vowels.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A phonological modification of a vowel system in which a change in a particular vowel causes other adjacent vowels to also change in order to avoid vowel mergers."
      ],
      "links": [
        [
          "linguistics",
          "linguistics"
        ],
        [
          "phonology",
          "phonology"
        ],
        [
          "change",
          "change"
        ],
        [
          "vowel",
          "vowel"
        ],
        [
          "adjacent",
          "adjacent"
        ],
        [
          "merger",
          "merger"
        ]
      ],
      "raw_glosses": [
        "(linguistics, phonology) A phonological modification of a vowel system in which a change in a particular vowel causes other adjacent vowels to also change in order to avoid vowel mergers."
      ],
      "topics": [
        "human-sciences",
        "linguistics",
        "phonology",
        "sciences"
      ]
    }
  ],
  "word": "chain shift"
}