"common ancestor" meaning in English

{
  "forms": [
    {
      "form": "common ancestors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "common ancestor (plural common ancestors)",
      "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 Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with German translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Hungarian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "last common ancestor"
        }
      ],
      "examples": [
        {
          "text": "The monarchs of Spain and the UK have a common ancestor namely Queen Victoria.",
          "type": "example"
        },
        {
          "text": "The chimpanzee and the gorilla have a common ancestor.",
          "type": "example"
        },
        {
          "text": "The theory of evolution states that all life on Earth has a common ancestor.",
          "type": "example"
        }
      ],
      "glosses": [
        "An ancestor that two or more descendants have in common."
      ],
      "id": "en-common_ancestor-en-noun-zecA2uPJ",
      "links": [
        [
          "descendant",
          "descendant"
        ],
        [
          "in common",
          "in common"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "common ancestor",
          "word": "yhteinen esi-isä"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "common ancestor",
          "tags": [
            "masculine"
          ],
          "word": "gemeinsamer Vorfahre"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "common ancestor",
          "word": "közös ős"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "óbščij prédok",
          "sense": "common ancestor",
          "tags": [
            "masculine"
          ],
          "word": "о́бщий пре́док"
        }
      ]
    }
  ],
  "word": "common ancestor"
}

{
  "derived": [
    {
      "word": "last common ancestor"
    }
  ],
  "forms": [
    {
      "form": "common ancestors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "common ancestor (plural common ancestors)",
      "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 usage examples",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations",
        "Terms with Hungarian translations",
        "Terms with Russian translations"
      ],
      "examples": [
        {
          "text": "The monarchs of Spain and the UK have a common ancestor namely Queen Victoria.",
          "type": "example"
        },
        {
          "text": "The chimpanzee and the gorilla have a common ancestor.",
          "type": "example"
        },
        {
          "text": "The theory of evolution states that all life on Earth has a common ancestor.",
          "type": "example"
        }
      ],
      "glosses": [
        "An ancestor that two or more descendants have in common."
      ],
      "links": [
        [
          "descendant",
          "descendant"
        ],
        [
          "in common",
          "in common"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "common ancestor",
      "word": "yhteinen esi-isä"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "common ancestor",
      "tags": [
        "masculine"
      ],
      "word": "gemeinsamer Vorfahre"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "common ancestor",
      "word": "közös ős"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "óbščij prédok",
      "sense": "common ancestor",
      "tags": [
        "masculine"
      ],
      "word": "о́бщий пре́док"
    }
  ],
  "word": "common ancestor"
}