According to Google:

bo͝ok/

noun

1. a written or printed work consisting of pages glued or sewn together along one side and bound in covers.

“a book of selected poems”

 synonyms: volume, tome, publication, title;

2. a bound set of blank sheets for writing or keeping records in.

“an accounts book”

 synonyms: notebook, notepad, pad, memo pad, exercise book, workbook;

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According to Dictionary.com:

noun

1. a handwritten or printed work of fiction or nonfiction, usually on sheets of paper fastened or bound together within covers.

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According to Books n’About:

1. knowledge in tangible format.

2. a collection of words and sentences, organized in a way that create a fictional or non-fictional text, containing someone’s thoughts in written format.

3. the vehicle for someone´s ideas to be timeless and available to the public.

4. a tool to exercise the mind, learn or acquire information and spark imagination.

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Mr. George