I. ˈrəd.ə(r) noun
( -s )
Etymology: Dutch ruiter, from Middle Dutch ruter, rutter, ruiter, from Old French routier, from route band, troop, route + -ier — more at route
archaic : a horseman or trooper originally of German forces common in the 15th and 16th centuries
II. noun
( -s )
Etymology: rut (IV) + -er
1. : one that ruts
2. : a plow for cutting ruts in a logging road for the runners of the sleds to run in