"that is to say" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "that is to say (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
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          "source": "w"
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "One of the best things about works of music is that they are repeatable, that is to say that one can listen to the same work over and over without becoming tired of it.",
          "type": "example"
        }
      ],
      "glosses": [
        "In other words. Used to introduce a clarification, simplification, or explanation"
      ],
      "id": "en-that_is_to_say-en-adv-oeZuNObz",
      "links": [
        [
          "In other words",
          "in other words"
        ],
        [
          "clarification",
          "clarification#English"
        ]
      ],
      "raw_glosses": [
        "(conjunctive) In other words. Used to introduce a clarification, simplification, or explanation"
      ],
      "synonyms": [
        {
          "word": "that is"
        },
        {
          "word": "i.e."
        },
        {
          "word": "in other words"
        }
      ],
      "tags": [
        "conjunctive",
        "not-comparable"
      ]
    }
  ],
  "word": "that is to say"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "that is to say (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English conjunctive adverbs",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with usage examples",
        "English uncomparable adverbs",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "text": "One of the best things about works of music is that they are repeatable, that is to say that one can listen to the same work over and over without becoming tired of it.",
          "type": "example"
        }
      ],
      "glosses": [
        "In other words. Used to introduce a clarification, simplification, or explanation"
      ],
      "links": [
        [
          "In other words",
          "in other words"
        ],
        [
          "clarification",
          "clarification#English"
        ]
      ],
      "raw_glosses": [
        "(conjunctive) In other words. Used to introduce a clarification, simplification, or explanation"
      ],
      "synonyms": [
        {
          "word": "that is"
        },
        {
          "word": "i.e."
        },
        {
          "word": "in other words"
        }
      ],
      "tags": [
        "conjunctive",
        "not-comparable"
      ]
    }
  ],
  "word": "that is to say"
}