Pronunciation: (ar'ē-er"ban'; Fr. a ryer bän'), [key]
—pl. -bansPronunciation: (-banz'; Fr. -bän'). [key]
1. a group of vassals who owed military service, esp. to French kings.
2. the summoning by a medieval ruler of all vassals and free men for military service.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.