客房 literally means 'guest room' — 客 (kè) means 'guest' or 'visitor', and 房 (fáng) means 'room' or 'house'. Together, they refer specifically to a room provided for guests to stay in, most commonly in hotels, guesthouses, or private homes. Unlike the general term 房间 (fángjiān), which just means 'room', 客房 carries an implied function: it is designated for temporary occupancy by visitors, not for permanent residence or other purposes like storage or work.

This word is standard in hospitality contexts — you’ll see it on hotel signs, reservation websites, and staff announcements. It’s neutral in register (neither formal nor casual) and widely understood across all Chinese-speaking regions. While 客房 can occasionally be used metaphorically (e.g., 'a room open to new ideas'), its overwhelming usage is literal and practical, tied to accommodation services.