"crack a book" meaning in English

{
  "forms": [
    {
      "form": "cracks a book",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "cracking a book",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "cracked a book",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "cracked a book",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "crack a book (third-person singular simple present cracks a book, present participle cracking a book, simple past and past participle cracked a book)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "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 language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English predicates",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "You had better crack the books if you want to have any chance of graduating this year."
        },
        {
          "text": "Of course he didn't even know that the Partition happened in the 1940s, let alone any details of cross-border disputes since then. It's not like that guy ever cracks a book.",
          "type": "example"
        }
      ],
      "glosses": [
        "To open up one's books, especially in order to study."
      ],
      "id": "en-crack_a_book-en-verb-EhkV~E~T",
      "links": [
        [
          "open",
          "open"
        ],
        [
          "study",
          "study"
        ]
      ],
      "raw_glosses": [
        "(informal) To open up one's books, especially in order to study."
      ],
      "related": [
        {
          "word": "hit the books"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "crack a book"
}

{
  "forms": [
    {
      "form": "cracks a book",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "cracking a book",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "cracked a book",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "cracked a book",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "crack a book (third-person singular simple present cracks a book, present participle cracking a book, simple past and past participle cracked a book)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "hit the books"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English predicates",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with usage examples",
        "English verbs"
      ],
      "examples": [
        {
          "text": "You had better crack the books if you want to have any chance of graduating this year."
        },
        {
          "text": "Of course he didn't even know that the Partition happened in the 1940s, let alone any details of cross-border disputes since then. It's not like that guy ever cracks a book.",
          "type": "example"
        }
      ],
      "glosses": [
        "To open up one's books, especially in order to study."
      ],
      "links": [
        [
          "open",
          "open"
        ],
        [
          "study",
          "study"
        ]
      ],
      "raw_glosses": [
        "(informal) To open up one's books, especially in order to study."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "crack a book"
}