"POO" meaning in English

{
  "forms": [
    {
      "form": "POOs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "POO (plural POOs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "post-office order"
        }
      ],
      "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 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Money",
          "orig": "en:Money",
          "parents": [
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Post",
          "orig": "en:Post",
          "parents": [
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1856 June 28, John Addington Symonds, letter in Letters, Vol. I, p. 75",
          "text": "Thank Papa very much for the P.O.O. which I got cashed without difficulty."
        },
        {
          "ref": "1877, Army and Navy Gazette - Volume 18, page 192:",
          "text": "A Coupon will be found below, which will be redeemed if accompanied by P.O.O. for 1s. 6d or 20 stamps.",
          "type": "quote"
        },
        {
          "ref": "2013, R. L. Wallace, The Canary Book, →ISBN:",
          "text": "... it is customary after the bargain is made for the purchaser to send a P.O.O. for the amount before the birds are sent off.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Initialism of post-office order."
      ],
      "id": "en-POO-en-noun-Rpw9kYNF",
      "links": [
        [
          "post-office order",
          "post-office order#English"
        ]
      ],
      "raw_glosses": [
        "(historical) Initialism of post-office order."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "historical",
        "initialism"
      ]
    }
  ],
  "word": "POO"
}

{
  "forms": [
    {
      "form": "POOs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "POO (plural POOs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "post-office order"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English terms with historical senses",
        "English terms with quotations",
        "Pages with 2 entries",
        "Pages with entries",
        "en:Money",
        "en:Post"
      ],
      "examples": [
        {
          "ref": "1856 June 28, John Addington Symonds, letter in Letters, Vol. I, p. 75",
          "text": "Thank Papa very much for the P.O.O. which I got cashed without difficulty."
        },
        {
          "ref": "1877, Army and Navy Gazette - Volume 18, page 192:",
          "text": "A Coupon will be found below, which will be redeemed if accompanied by P.O.O. for 1s. 6d or 20 stamps.",
          "type": "quote"
        },
        {
          "ref": "2013, R. L. Wallace, The Canary Book, →ISBN:",
          "text": "... it is customary after the bargain is made for the purchaser to send a P.O.O. for the amount before the birds are sent off.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Initialism of post-office order."
      ],
      "links": [
        [
          "post-office order",
          "post-office order#English"
        ]
      ],
      "raw_glosses": [
        "(historical) Initialism of post-office order."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "historical",
        "initialism"
      ]
    }
  ],
  "word": "POO"
}