Webster’s Revised Unabridged Dictionary · 1913
Millenary
Mil′le·na·ry, a. [L. millenarius, fr. milleni a thousand each, fr. mille a thousand: cf. F. millénaire. See Mile.] Consisting of a thousand; millennial.
Mil′le·na·ry, n. The space of a thousand years; a millennium; also, a Millenarian."During that millenary." Hare.