"domino theory" meaning in English

{
  "etymology_text": "An allusion to a row of dominoes in which the fall of one leads to a cascade of falling pieces.",
  "forms": [
    {
      "form": "the domino theory",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1"
      },
      "expansion": "the domino theory",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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": "Cold War",
          "orig": "en:Cold War",
          "parents": [
            "Historical events",
            "History of Europe",
            "History of the United States",
            "Nuclear warfare",
            "Soviet Union",
            "History",
            "Europe",
            "United States",
            "War",
            "Weapons",
            "Asia",
            "All topics",
            "Earth",
            "Eurasia",
            "North America",
            "Conflict",
            "Military",
            "Violence",
            "Hunting",
            "Tools",
            "Fundamental",
            "Nature",
            "America",
            "Human behaviour",
            "Society",
            "Human activity",
            "Technology",
            "Human"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Politics",
          "orig": "en:Politics",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of domino effect"
      ],
      "id": "en-domino_theory-en-name-19Bf9KUv",
      "links": [
        [
          "politics",
          "politics"
        ],
        [
          "domino effect",
          "domino effect#English"
        ]
      ],
      "raw_glosses": [
        "(politics, historical) Synonym of domino effect"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "domino effect"
        }
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "government",
        "politics"
      ],
      "wikipedia": [
        "Domino theory"
      ]
    }
  ],
  "word": "domino theory"
}

{
  "etymology_text": "An allusion to a row of dominoes in which the fall of one leads to a cascade of falling pieces.",
  "forms": [
    {
      "form": "the domino theory",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1"
      },
      "expansion": "the domino theory",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with historical senses",
        "English uncountable nouns",
        "en:Cold War",
        "en:Politics"
      ],
      "glosses": [
        "Synonym of domino effect"
      ],
      "links": [
        [
          "politics",
          "politics"
        ],
        [
          "domino effect",
          "domino effect#English"
        ]
      ],
      "raw_glosses": [
        "(politics, historical) Synonym of domino effect"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "domino effect"
        }
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "government",
        "politics"
      ],
      "wikipedia": [
        "Domino theory"
      ]
    }
  ],
  "word": "domino theory"
}