rare. [f. TRIPLE a. + -NESS.] The quality or condition of being triple; triplicity.
1840. H. G. Wright, in New Moral World, VIII. 14 Nov., 308/1. The assertion of fatality or of necessity in this mode, implies an inadequate appreciation of the tripleness of human nature and of its progressive advancement.
c. 1881. Hort, in Expositor, June (1907), 489. When there is tripleness and at the same time not mere co-ordination but progression.
