[f. BI- pref.2 II + MILLENARY, f. L. millēnārius containing a thousand.] Properly (like millenary) an adj., meaning: Of or pertaining to two thousand, two thousand strong; but taken to express: A space of two thousand years (for which bimillennium or some derivative of it would be the proper term).
1850. J. H. Newman, Diffic. Anglic., 130. To testify the very truth of revelation to a fallen generation, or rather to almost a bi-millenary, which has been in unintermittent traditionary error.
