
guest; visitor
customer; client; shopper; spectator; audience; tourist; sightseer; passenger
counter for containers used to entertain guests
「客」 has other readings with different meanings.
今日は客が多くて忙しい。
There are many guests today, so it's busy.
レジには客の列ができていた。
There was a line of customers at the register.
会社に来た大切な客にお茶を出しました。
I served tea to the important guest who came to the company.