"off the shelf" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
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      "expansion": "off the shelf",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "off-the-shelf"
        }
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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      "examples": [
        {
          "ref": "1964 May, R. K. Evans, “The Ventura—Paxman's high-speed engine”, in Modern Railways, page 328",
          "text": "After the war, the invaluable experience gained with mass production of the TP engines saw Davey Paxman in a favourable position to supply such units almost \"off the shelf\", a facility found to be of great value by oil companies engaged in well-drilling; [...].",
          "type": "quotation"
        },
        {
          "ref": "2019 October 23, Rail, page 28",
          "text": "Stadler Project Manager Matthias Hammerle explained: \"These trains for the Liverpool City Region are not 'off the shelf' but have been tailored to a very specific brief.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of off-the-shelf."
      ],
      "id": "en-off_the_shelf-en-prep_phrase-rxXcIQya",
      "links": [
        [
          "off-the-shelf",
          "off-the-shelf#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "off the shelf"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
      },
      "expansion": "off the shelf",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "off-the-shelf"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1964 May, R. K. Evans, “The Ventura—Paxman's high-speed engine”, in Modern Railways, page 328",
          "text": "After the war, the invaluable experience gained with mass production of the TP engines saw Davey Paxman in a favourable position to supply such units almost \"off the shelf\", a facility found to be of great value by oil companies engaged in well-drilling; [...].",
          "type": "quotation"
        },
        {
          "ref": "2019 October 23, Rail, page 28",
          "text": "Stadler Project Manager Matthias Hammerle explained: \"These trains for the Liverpool City Region are not 'off the shelf' but have been tailored to a very specific brief.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of off-the-shelf."
      ],
      "links": [
        [
          "off-the-shelf",
          "off-the-shelf#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
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    }
  ],
  "word": "off the shelf"
}