"そういえば" meaning in Japanese

{
  "etymology_templates": [
    {
      "args": {
        "1": "言う",
        "2": "いう",
        "3": "to say"
      },
      "expansion": "言(い)う (iu, “to say”)",
      "name": "ja-r"
    },
    {
      "args": {
        "1": "そう",
        "2": "",
        "3": "言えば",
        "4": "いえば",
        "nocat": "y",
        "pos2": "conditional form of 言(い)う (<span class=\"mention-tr tr\">iu</span>, “to say”)",
        "t1": "like that, so"
      },
      "expansion": "そう (sō, “like that, so”) + 言(い)えば (ieba, conditional form of 言(い)う (iu, “to say”))",
      "name": "ja-com"
    },
    {
      "args": {
        "1": "",
        "2": "l",
        "3": "L"
      },
      "expansion": "L",
      "name": "yesno"
    },
    {
      "args": {
        "1": "speaking of that...."
      },
      "expansion": "“speaking of that....”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "speaking of that...."
      },
      "expansion": "Literally, “speaking of that....”",
      "name": "lit"
    }
  ],
  "etymology_text": "From そう (sō, “like that, so”) + 言(い)えば (ieba, conditional form of 言(い)う (iu, “to say”)). Literally, “speaking of that....”",
  "forms": [
    {
      "form": "sō ieba",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "そう言えば",
      "tags": [
        "alternative",
        "kanji"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection",
        "2": "そう いえば"
      },
      "expansion": "そういえば • (sō ieba)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with Nakadaka pitch accent (Tōkyō)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "come to mention it"
      ],
      "id": "en-そういえば-ja-intj-9o-IPJC~",
      "links": [
        [
          "come to mention it",
          "come to mention it"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "そーいえば"
    },
    {
      "ipa": "[so̞ː ie̞ba̠]"
    }
  ],
  "word": "そういえば"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "言う",
        "2": "いう",
        "3": "to say"
      },
      "expansion": "言(い)う (iu, “to say”)",
      "name": "ja-r"
    },
    {
      "args": {
        "1": "そう",
        "2": "",
        "3": "言えば",
        "4": "いえば",
        "nocat": "y",
        "pos2": "conditional form of 言(い)う (<span class=\"mention-tr tr\">iu</span>, “to say”)",
        "t1": "like that, so"
      },
      "expansion": "そう (sō, “like that, so”) + 言(い)えば (ieba, conditional form of 言(い)う (iu, “to say”))",
      "name": "ja-com"
    },
    {
      "args": {
        "1": "",
        "2": "l",
        "3": "L"
      },
      "expansion": "L",
      "name": "yesno"
    },
    {
      "args": {
        "1": "speaking of that...."
      },
      "expansion": "“speaking of that....”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "speaking of that...."
      },
      "expansion": "Literally, “speaking of that....”",
      "name": "lit"
    }
  ],
  "etymology_text": "From そう (sō, “like that, so”) + 言(い)えば (ieba, conditional form of 言(い)う (iu, “to say”)). Literally, “speaking of that....”",
  "forms": [
    {
      "form": "sō ieba",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "そう言えば",
      "tags": [
        "alternative",
        "kanji"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection",
        "2": "そう いえば"
      },
      "expansion": "そういえば • (sō ieba)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese hiragana",
        "Japanese interjections",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation with pitch accent",
        "Japanese terms with Nakadaka pitch accent (Tōkyō)",
        "Japanese terms with redundant sortkeys",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "come to mention it"
      ],
      "links": [
        [
          "come to mention it",
          "come to mention it"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "そーいえば"
    },
    {
      "ipa": "[so̞ː ie̞ba̠]"
    }
  ],
  "word": "そういえば"
}