- a sexual situation involving a larger group of people. A gangbang.
- In roman times, a large party with many people, the best food, wild sex, and other intense experiences. The Penthouse movie Caligula featured a number of orgy scenes in it.
- A modern rock band, best know for a cover version of the song "Blue Mondays".
In relation to most modern only porn sites, orgy pretty much means any sexy involving 4 or more people, often in a party setting. Amateur house parties are often what would be considered an orgy.