A minyan means a prayer quorum. In orthodox Judaism, you have to have ten men in a room to say certain prayers.
Chaptzem writes: "Lakewood is considering implementing a new 11 man minyan takunah. If this new takunah is approved by the Rabbanim 11 men will need to be present during every minyan. The new takunah will serve as a precaution in the event that one of the men from the minyan turn out to be not Jewish."
Anon adds: "I think the new ruling is that 9 men are allowed to make a minyan if one of them is carrying a shotgun."
