1.
guest, visitor
Someone who visits a home or is invited somewhere. A person being hosted.
2.
customer, client
Someone who buys goods or services from a business.
客 means "guest" or "customer." It's often used with polite prefixes and suffixes in service contexts.
POLITENESS LEVELS:
- 客: customer/guest (plain, can sound blunt)
- お客さん: customer/guest (polite)
- お客さま: customer/guest (very polite, service industry)
COMMON COMPOUNDS:
- 客室: guest room
- 客席: audience seating, passenger seat
- 乗客: passenger
- 観客: spectator, audience
- 来客: visitor, guest
USAGE NOTE: In business and service contexts, using 客 alone can sound cold or rude. お客さま is standard in retail and hospitality.