a body or society of persons united by a common rule; a monastic society; any of the nine grades of angels; a body of persons of the same profession, occupation, or pursuit; a category of architectural design, e.g., Doric Order. See also rank, row, series.
Orb
Orchestra
Order
Ostentation
Outburst
Examples: order of architecture; of beggars; of laity; of mouldings; of pillars; of the Round Table; of Templars.