a concise reference book providing specific information about a subject or location
"Before our trip to Paris, I quickly consulted the city handbook to find the best metro lines and hidden cafes."
A topically organized book of reference on a certain field of knowledge, regardless of size.
"The new employee quickly found the answer to her question in the handbook's section on workplace safety protocols."
In plain English: A handbook is a simple guide that gives you all the important rules and information you need to know about a specific topic or job.
"The new employee read the handbook to learn the company rules."
Usage: Use "handbook" to refer to a concise, portable guide containing essential information on a specific subject, such as a travel manual or employee instructions. It implies the material is designed for quick consultation rather than deep study or extensive reading.
The word handbook comes from Middle English and Old English, originally meaning a book held in the hand. Its form is likely reinforced by the German word for the same concept, though it can also be seen as simply combining "hand" and "book."