"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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "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": "quotation"
        },
        {
          "ref": "2013, R. L. Wallace, The Canary Book",
          "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": "quotation"
        }
      ],
      "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 entries with topic categories using raw markup",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English terms with historical senses",
        "English terms with quotations",
        "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": "quotation"
        },
        {
          "ref": "2013, R. L. Wallace, The Canary Book",
          "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": "quotation"
        }
      ],
      "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"
}