[UN-2 8.] The action of undeceiving or the fact of being undeceived.
1694. Gracians Courtiers Orac., 191. At present undeception is politick, it goes commonly betwixt two lights.
1820. C. R. Maturin, Melmoth, xxix. IV. 309. Oh Margaretthat undeception plants a dagger in the heart.
1870. R. Black, trans. Guizots France, I. xiii. 301. Length of life brings, in the soul of the ambitious, days of hearty undeception.