"postum note" meaning in English

{
  "etymology_text": "Apparently from post-it note, influenced by Postum, a brand of coffee substitute",
  "forms": [
    {
      "form": "postum notes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "postum note (plural postum notes)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2016, Gerald James Avila, Home for Good:",
          "text": "He pulled a giant burrito from the ice chest, when he swung the fridge door open for a drink, he saw a large postum note, “Joan and I cleaned your fridge, it was so disgusting it was beyond words. So my suggestion to you is, “never bring home left-overs from a restaurant, it turns to ----.\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "A post-it note."
      ],
      "id": "en-postum_note-en-noun-5yMttaT-",
      "links": [
        [
          "post-it note",
          "post-it note"
        ]
      ],
      "related": [
        {
          "word": "postem note"
        }
      ],
      "wikipedia": [
        "Postum"
      ]
    }
  ],
  "word": "postum note"
}

{
  "etymology_text": "Apparently from post-it note, influenced by Postum, a brand of coffee substitute",
  "forms": [
    {
      "form": "postum notes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "postum note (plural postum notes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "postem note"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2016, Gerald James Avila, Home for Good:",
          "text": "He pulled a giant burrito from the ice chest, when he swung the fridge door open for a drink, he saw a large postum note, “Joan and I cleaned your fridge, it was so disgusting it was beyond words. So my suggestion to you is, “never bring home left-overs from a restaurant, it turns to ----.\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "A post-it note."
      ],
      "links": [
        [
          "post-it note",
          "post-it note"
        ]
      ],
      "wikipedia": [
        "Postum"
      ]
    }
  ],
  "word": "postum note"
}