[stul.ti.fy] vt -fied ; -fy.ing [LL stultificare to make foolish, fr. L stultus foolish; akin to L stolidus stolid] (1766) 1: to allege or prove to be of unsound mind and hence not responsible
2: to cause to appear or be stupid, foolish, or absurdly illogical 3 a: to impair, invalidate, or make ineffective: negate b: to have a dulling or inhibiting effect on -- stul.ti.fi.ca.tion n