n. in a freight canoe, York boat, or bateau, one of the crewmen who worked the paddles or oars from a middle position in the craft, a rank inferior to that of the bowsman or steersman.
1897  Men not so difficult to hire this year as last, when boaters for Lower Red River refused 700 G.P. Cy. and milieux 500, with extra equipments.
1930  Beads were given to the devants but not to the milieux.
1966  The men in the middle of the canoes were referred to as a group as the milieux. . . .