Source : Webster's Revised Unabridged Dictionary (1913)

Incogitant \In*cog"i*tant\, a. [L. incogitans; pref. in- not +
   cogitans, p. pr. of cogitare to think. See {Cogitate}.]
   Toughtless; inconsiderate. [R.] --Milton.

         Men are careless and incogitant.         --J. Goodman.