"o/b/o" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "on behalf of"
        }
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      "glosses": [
        "Initialism of on behalf of."
      ],
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  "synonyms": [
    {
      "_dis1": "47 0 53",
      "word": "b/o"
    },
    {
      "_dis1": "47 0 53",
      "word": "B/O"
    },
    {
      "_dis1": "47 0 53",
      "word": "OBO"
    }
  ],
  "word": "o/b/o"
}

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  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "or best offer"
        }
      ],
      "categories": [],
      "glosses": [
        "Initialism of or best offer."
      ],
      "id": "en-o/b/o-en-phrase-FIKgeeyI",
      "links": [
        [
          "offer",
          "offer#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
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    },
    {
      "alt_of": [
        {
          "extra": "commonly seen in real estate sales advertisements",
          "word": "offered by owner"
        }
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      "glosses": [
        "Initialism of offered by owner (commonly seen in real estate sales advertisements)"
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        "alt-of",
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  "synonyms": [
    {
      "_dis1": "47 0 53",
      "word": "b/o"
    },
    {
      "_dis1": "47 0 53",
      "word": "B/O"
    },
    {
      "_dis1": "47 0 53",
      "word": "OBO"
    }
  ],
  "word": "o/b/o"
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  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
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      "alt_of": [
        {
          "word": "on behalf of"
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        "Initialism of on behalf of."
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  "synonyms": [
    {
      "word": "b/o"
    },
    {
      "word": "B/O"
    },
    {
      "word": "OBO"
    }
  ],
  "word": "o/b/o"
}

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          "word": "or best offer"
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        "Initialism of or best offer."
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        "Initialism of offered by owner (commonly seen in real estate sales advertisements)"
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  "synonyms": [
    {
      "word": "b/o"
    },
    {
      "word": "B/O"
    },
    {
      "word": "OBO"
    }
  ],
  "word": "o/b/o"
}