a person entertained in one's home
Guests can be, and often are, delightful, but they should never be allowed to get the upper hand — Elizabeth von Arnim
a person taken out and, entertained at another's expense, and paid for by another
a person who pays to stay at a hotel, etc for the services of an establishment (e.g. a hotel)
somebody who is present by invitation
one of the guests on tonight's show
a guest star on a TV programme
[Middle English gest from Old Norse gestr]