"compare notes" meaning in English

{
  "forms": [
    {
      "form": "compares notes",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "comparing notes",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "compared notes",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "compared notes",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "compare notes (third-person singular simple present compares notes, present participle comparing notes, simple past and past participle compared notes)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1960 January, G. Freeman Allen, “\"Condor\"—British Railways' fastest freight train”, in Trains Illustrated, page 47:",
          "text": "Two minutes are allowed \"Condor\" at Carlisle, and those involved had no time to compare notes on the state of the nation, the management, the unions or the racing calendar.",
          "type": "quote"
        },
        {
          "ref": "2005, Judith Rogers, The Disabled Woman's Guide to Pregnancy and Birth, page 194:",
          "text": "Priscilla's only problem in the first trimester was fatigue. She said, \"It helped to compare notes with women who had many more discomforts than I did.\"",
          "type": "quote"
        },
        {
          "ref": "2009, Julian Barnes, Vanessa Guignery, Ryan Roberts, Conversations with Julian Barnes, page 3:",
          "text": "They cultivate rootlessness and cynicism, shout ironic encouragement from the sidelines of football fields, compare notes on the boring ineffectuality of adults, compare notes on ventures in piss-taking, indolently lay sardonic plans for the future.",
          "type": "quote"
        },
        {
          "ref": "2014, Irving Fisher, The Money Illusion:",
          "text": "It follows, of course, that when people from different countries with different moneys compare notes they find that their ideas are in conflict.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To exchange information and ideas about related experiences."
      ],
      "id": "en-compare_notes-en-verb-IVJ9MKAY",
      "links": [
        [
          "exchange",
          "exchange"
        ],
        [
          "information",
          "information"
        ],
        [
          "idea",
          "idea"
        ],
        [
          "related",
          "related"
        ],
        [
          "experience",
          "experience"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To exchange information and ideas about related experiences."
      ],
      "related": [
        {
          "word": "pick someone's brain"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "compare notes"
}

{
  "forms": [
    {
      "form": "compares notes",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "comparing notes",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "compared notes",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "compared notes",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "compare notes (third-person singular simple present compares notes, present participle comparing notes, simple past and past participle compared notes)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "pick someone's brain"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1960 January, G. Freeman Allen, “\"Condor\"—British Railways' fastest freight train”, in Trains Illustrated, page 47:",
          "text": "Two minutes are allowed \"Condor\" at Carlisle, and those involved had no time to compare notes on the state of the nation, the management, the unions or the racing calendar.",
          "type": "quote"
        },
        {
          "ref": "2005, Judith Rogers, The Disabled Woman's Guide to Pregnancy and Birth, page 194:",
          "text": "Priscilla's only problem in the first trimester was fatigue. She said, \"It helped to compare notes with women who had many more discomforts than I did.\"",
          "type": "quote"
        },
        {
          "ref": "2009, Julian Barnes, Vanessa Guignery, Ryan Roberts, Conversations with Julian Barnes, page 3:",
          "text": "They cultivate rootlessness and cynicism, shout ironic encouragement from the sidelines of football fields, compare notes on the boring ineffectuality of adults, compare notes on ventures in piss-taking, indolently lay sardonic plans for the future.",
          "type": "quote"
        },
        {
          "ref": "2014, Irving Fisher, The Money Illusion:",
          "text": "It follows, of course, that when people from different countries with different moneys compare notes they find that their ideas are in conflict.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To exchange information and ideas about related experiences."
      ],
      "links": [
        [
          "exchange",
          "exchange"
        ],
        [
          "information",
          "information"
        ],
        [
          "idea",
          "idea"
        ],
        [
          "related",
          "related"
        ],
        [
          "experience",
          "experience"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To exchange information and ideas about related experiences."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "compare notes"
}