"back pocket" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "back",
        "3": "pocket"
      },
      "expansion": "back + pocket",
      "name": "af"
    }
  ],
  "etymology_text": "From back + pocket.",
  "forms": [
    {
      "form": "back pockets",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "backpocket",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "back-pocket",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "back pocket (plural back pockets)",
      "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": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Hungarian translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Swedish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "tags": [
            "verb"
          ],
          "word": "back-pocket"
        },
        {
          "word": "in one's back pocket"
        }
      ],
      "examples": [
        {
          "ref": "2014 June 20, Pete Cashmore, “How to become an instant Italy fan”, in The Guardian:",
          "text": "To appear in the know, regale your new Italian chums with tales of how he covered the Italy squad in his Panini stickers album with nothing but his own face, or the classic story of the time he was stopped by police with £5,000 in cash in his backpocket and explained it with the line \"Because I am rich\".",
          "type": "quote"
        }
      ],
      "glosses": [
        "A pocket found on the back of a pair of trousers."
      ],
      "id": "en-back_pocket-en-noun-KbtV8fvF",
      "links": [
        [
          "pocket",
          "pocket"
        ],
        [
          "back",
          "back"
        ],
        [
          "pair",
          "pair"
        ],
        [
          "trousers",
          "trousers"
        ]
      ],
      "related": [
        {
          "word": "hip pocket"
        }
      ],
      "translations": [
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "pocket found on the back of trousers",
          "word": "farzseb"
        },
        {
          "code": "sv",
          "lang": "Swedish",
          "sense": "pocket found on the back of trousers",
          "tags": [
            "common-gender"
          ],
          "word": "bakficka"
        }
      ]
    }
  ],
  "word": "back pocket"
}

{
  "derived": [
    {
      "tags": [
        "verb"
      ],
      "word": "back-pocket"
    },
    {
      "word": "in one's back pocket"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "back",
        "3": "pocket"
      },
      "expansion": "back + pocket",
      "name": "af"
    }
  ],
  "etymology_text": "From back + pocket.",
  "forms": [
    {
      "form": "back pockets",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "backpocket",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "back-pocket",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "back pocket (plural back pockets)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "hip pocket"
    }
  ],
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Hungarian translations",
        "Terms with Swedish translations"
      ],
      "examples": [
        {
          "ref": "2014 June 20, Pete Cashmore, “How to become an instant Italy fan”, in The Guardian:",
          "text": "To appear in the know, regale your new Italian chums with tales of how he covered the Italy squad in his Panini stickers album with nothing but his own face, or the classic story of the time he was stopped by police with £5,000 in cash in his backpocket and explained it with the line \"Because I am rich\".",
          "type": "quote"
        }
      ],
      "glosses": [
        "A pocket found on the back of a pair of trousers."
      ],
      "links": [
        [
          "pocket",
          "pocket"
        ],
        [
          "back",
          "back"
        ],
        [
          "pair",
          "pair"
        ],
        [
          "trousers",
          "trousers"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "pocket found on the back of trousers",
      "word": "farzseb"
    },
    {
      "code": "sv",
      "lang": "Swedish",
      "sense": "pocket found on the back of trousers",
      "tags": [
        "common-gender"
      ],
      "word": "bakficka"
    }
  ],
  "word": "back pocket"
}