a person who spends some time at another person's home in some social activity, as a visit, dinner, or party.

a person who receives the hospitality of a club, a city, or the like.

a person who patronizes a hotel, restaurant, etc., for the lodging, food, or entertainment it provides.

an often well-known person invited to participate or perform in a regular program, series, etc., as a substitute for a regular member or as a special attraction.

Zoology . an inquiline.

to entertain as a guest.

to be a guest; make an appearance as a guest

She's been guesting on all the TV talk shows.

provided for or done by a guest

a guest towel; a guest column for a newspaper.

participating or performing as a guest

a guest conductor.

noun

bedfellow , boarder , caller , client , companion , company , customer , frequenter * , habitu , inmate , lodger , mate , out-of-towner , partaker , patron , recipient , renter , roomer , sharer , sojourner , tenant , transient , vacationer , visitant , visitor , bludger , cadger , freeloader , frequenter , friend , invitee , scrounger , sponger