Possible Definitions:
1. Guest (n.) A visitor; a person received and entertained in one's house or at one's table; a visitor entertained without pay.
2. Guest (v. t.) To receive or entertain hospitably.
3. Guest (v. i.) To be, or act the part of, a guest.
4. Guest (n.) Any insect that lives in the nest of another without compulsion and usually not as a parasite.
5. Guest (n.) An inquiline.