"book up" meaning in English

{
  "forms": [
    {
      "form": "books up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "booking up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "booked up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "booked up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "book up (third-person singular simple present books up, present participle booking up, simple past and past participle booked up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "13 42 38 8",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "derived": [
        {
          "_dis1": "100 0 0 0",
          "word": "booked up"
        }
      ],
      "glosses": [
        "To reserve or book all of something, for example by purchasing all the tickets."
      ],
      "id": "en-book_up-en-verb-ZUq7Pnp2",
      "links": [
        [
          "reserve",
          "reserve"
        ],
        [
          "book",
          "book"
        ]
      ],
      "raw_glosses": [
        "(transitive) To reserve or book all of something, for example by purchasing all the tickets."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [
        {
          "_dis": "8 43 44 5",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "10 40 40 11",
          "kind": "other",
          "name": "English phrasal verbs formed with \"up\"",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 42 38 8",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "Flights are beginning to book up as people flee the region.",
          "type": "example"
        }
      ],
      "glosses": [
        "To have all of its tickets or reservations purchased."
      ],
      "id": "en-book_up-en-verb-~Cgzu9f8",
      "raw_glosses": [
        "(intransitive) To have all of its tickets or reservations purchased."
      ],
      "tags": [
        "intransitive"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Chess",
          "orig": "en:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "8 43 44 5",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "10 40 40 11",
          "kind": "other",
          "name": "English phrasal verbs formed with \"up\"",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 42 38 8",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2022 May 8, Colin McGourty, “Superbet Classic 3: Aronian’s great escape, Deac beats Rapport”, in Chess24:",
          "text": "There would be more extraordinary clock goings on in the big game of the day, Aronian-Firouzja, which began by giving a partial answer to the question of what Alireza Firouzja had been doing for the last five months. He’d been booking up on some old theory!",
          "type": "quote"
        }
      ],
      "glosses": [
        "To study opening lines in great detail in order to gain an advantage."
      ],
      "id": "en-book_up-en-verb-GlzKKb6n",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ],
        [
          "line",
          "line"
        ],
        [
          "advantage",
          "advantage"
        ]
      ],
      "raw_glosses": [
        "(chess, slang) To study opening lines in great detail in order to gain an advantage."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    },
    {
      "categories": [
        {
          "_dis": "10 40 40 11",
          "kind": "other",
          "name": "English phrasal verbs formed with \"up\"",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "To study or learn (something)."
      ],
      "id": "en-book_up-en-verb-o7tOP5Zo",
      "raw_glosses": [
        "(transitive, slang) To study or learn (something)."
      ],
      "tags": [
        "slang",
        "transitive"
      ]
    }
  ],
  "word": "book up"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English phrasal verbs",
    "English phrasal verbs formed with \"up\"",
    "English verbs",
    "Pages with 1 entry"
  ],
  "derived": [
    {
      "word": "booked up"
    }
  ],
  "forms": [
    {
      "form": "books up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "booking up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "booked up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "booked up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "book up (third-person singular simple present books up, present participle booking up, simple past and past participle booked up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English transitive verbs"
      ],
      "glosses": [
        "To reserve or book all of something, for example by purchasing all the tickets."
      ],
      "links": [
        [
          "reserve",
          "reserve"
        ],
        [
          "book",
          "book"
        ]
      ],
      "raw_glosses": [
        "(transitive) To reserve or book all of something, for example by purchasing all the tickets."
      ],
      "tags": [
        "transitive"
      ]
    },
    {
      "categories": [
        "English intransitive verbs",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "Flights are beginning to book up as people flee the region.",
          "type": "example"
        }
      ],
      "glosses": [
        "To have all of its tickets or reservations purchased."
      ],
      "raw_glosses": [
        "(intransitive) To have all of its tickets or reservations purchased."
      ],
      "tags": [
        "intransitive"
      ]
    },
    {
      "categories": [
        "English slang",
        "English terms with quotations",
        "en:Chess"
      ],
      "examples": [
        {
          "ref": "2022 May 8, Colin McGourty, “Superbet Classic 3: Aronian’s great escape, Deac beats Rapport”, in Chess24:",
          "text": "There would be more extraordinary clock goings on in the big game of the day, Aronian-Firouzja, which began by giving a partial answer to the question of what Alireza Firouzja had been doing for the last five months. He’d been booking up on some old theory!",
          "type": "quote"
        }
      ],
      "glosses": [
        "To study opening lines in great detail in order to gain an advantage."
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ],
        [
          "line",
          "line"
        ],
        [
          "advantage",
          "advantage"
        ]
      ],
      "raw_glosses": [
        "(chess, slang) To study opening lines in great detail in order to gain an advantage."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    },
    {
      "categories": [
        "English slang",
        "English transitive verbs"
      ],
      "glosses": [
        "To study or learn (something)."
      ],
      "raw_glosses": [
        "(transitive, slang) To study or learn (something)."
      ],
      "tags": [
        "slang",
        "transitive"
      ]
    }
  ],
  "word": "book up"
}