Definitions of guest:

noun: a visitor to whom hospitality is extended
noun: a customer of a hotel or restaurant etc.
noun: United States journalist (born in England) noted for his syndicated homey verse (1881-1959)
noun: (computer science) any computer that is hooked up to a computer network
name: A surname (rare: 1 in 25000 families; popularity rank in the U.S.: #3312)