guide·book /ˈɡaɪdbʊk/ noun [countableC] INSTRUCTIONSa book about a city, country etc 旅行指南,旅游手册► see thesaurus at book guidebook• By the mid-twelfth century pilgrims were sufficiently numerous to merit a guidebook.• This was because he used them as guidebooks.• Puzzled, I checked my guidebook again.• It is pleasant enjoying the upgrading as new guidebooks come out!• We also booked hotels in advance, since the guidebooks said that they tended to be busy.• The guidebook also provides useful information about the people who lived in the regions through which the pilgrim would have to pass.• He had no expectations or intentions that they would ever become constantly updated guidebooks for the use of millions.