a properly constituted group for a public Jewish prayer service, made up of at least ten Jewish males (in some congregations, males or females) over thirteen years of age
See minyan in American Heritage Dictionary 4
(mĭnˈyən, mēn-yänˈ)
nounpl.min·ya·nim(mēn-yä-nēmˈ, mĭn-yôˈnĭm) or min·yans(mĭnˈyənz)
The minimum number of ten adult Jews or, among the Orthodox, Jewish men required for a communal religious service.