"many-to-many" meaning in English

{
  "coordinate_terms": [
    {
      "_dis1": "0 0",
      "word": "one-to-one"
    },
    {
      "_dis1": "0 0",
      "word": "one-to-many"
    },
    {
      "_dis1": "0 0",
      "word": "many-to-one"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "many-to-many (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Logic",
          "orig": "en:Logic",
          "parents": [
            "Formal sciences",
            "Philosophy",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "\"Is a fellow citizen with\" is a many-to-many relationship on the set of people (from the set of people to the set of people).",
          "type": "example"
        }
      ],
      "glosses": [
        "Having the property that many elements of one set may be assigned by the relationship to any element in the other set, and that a given element in the first set can also be assigned more than one member of the second set."
      ],
      "id": "en-many-to-many-en-adj-3nKA-P31",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "logic",
          "logic"
        ],
        [
          "set",
          "set"
        ],
        [
          "property",
          "property"
        ],
        [
          "elements",
          "elements"
        ],
        [
          "assign",
          "assign"
        ],
        [
          "relationship",
          "relationship"
        ]
      ],
      "raw_glosses": [
        "(mathematics, logic, of a relationship between two sets) Having the property that many elements of one set may be assigned by the relationship to any element in the other set, and that a given element in the first set can also be assigned more than one member of the second set."
      ],
      "raw_tags": [
        "of a relationship between two sets"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ]
    },
    {
      "categories": [
        {
          "_dis": "24 76",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "27 73",
          "kind": "other",
          "name": "English reduplicated coordinated pairs",
          "parents": [
            "Reduplicated coordinated pairs",
            "Coordinated pairs",
            "Reduplications",
            "Terms by etymology"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "26 74",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "20 80",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "The normal state of human affairs is many-to-many communications, each source going out to many recipients, but each recipient also having multiple sources.",
          "type": "example"
        }
      ],
      "glosses": [
        "From many sources to many recipients."
      ],
      "id": "en-many-to-many-en-adj-O~RrfdqQ",
      "links": [
        [
          "source",
          "source"
        ],
        [
          "recipient",
          "recipient"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "topics": [
        "mathematics",
        "sciences",
        "logic",
        "mathematics",
        "philosophy",
        "human-sciences",
        "sciences"
      ],
      "word": "many-many"
    }
  ],
  "wikipedia": [
    "many-to-many"
  ],
  "word": "many-to-many"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English reduplicated coordinated pairs",
    "English uncomparable adjectives",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "coordinate_terms": [
    {
      "word": "one-to-one"
    },
    {
      "word": "one-to-many"
    },
    {
      "word": "many-to-one"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "many-to-many (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English terms with usage examples",
        "en:Logic",
        "en:Mathematics"
      ],
      "examples": [
        {
          "text": "\"Is a fellow citizen with\" is a many-to-many relationship on the set of people (from the set of people to the set of people).",
          "type": "example"
        }
      ],
      "glosses": [
        "Having the property that many elements of one set may be assigned by the relationship to any element in the other set, and that a given element in the first set can also be assigned more than one member of the second set."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "logic",
          "logic"
        ],
        [
          "set",
          "set"
        ],
        [
          "property",
          "property"
        ],
        [
          "elements",
          "elements"
        ],
        [
          "assign",
          "assign"
        ],
        [
          "relationship",
          "relationship"
        ]
      ],
      "raw_glosses": [
        "(mathematics, logic, of a relationship between two sets) Having the property that many elements of one set may be assigned by the relationship to any element in the other set, and that a given element in the first set can also be assigned more than one member of the second set."
      ],
      "raw_tags": [
        "of a relationship between two sets"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "human-sciences",
        "logic",
        "mathematics",
        "philosophy",
        "sciences"
      ]
    },
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "The normal state of human affairs is many-to-many communications, each source going out to many recipients, but each recipient also having multiple sources.",
          "type": "example"
        }
      ],
      "glosses": [
        "From many sources to many recipients."
      ],
      "links": [
        [
          "source",
          "source"
        ],
        [
          "recipient",
          "recipient"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "topics": [
        "mathematics",
        "sciences",
        "logic",
        "mathematics",
        "philosophy",
        "human-sciences",
        "sciences"
      ],
      "word": "many-many"
    }
  ],
  "wikipedia": [
    "many-to-many"
  ],
  "word": "many-to-many"
}