Source : Webster's Revised Unabridged Dictionary (1913)

Cogitation \Cog`i*ta"tion\, n. [L. cogitatio: cf. F.
   cogitation.]
   The act of thinking; thought; meditation; contemplation.
   ``Fixed in cogitation deep.'' --Milton.

Source : WordNet®

cogitation
     n 1: a carefully considered thought about something; "his
          cogitations were dutifully recorded in his daybook"
     2: attentive consideration and meditation; "after much
        cogitation he rejected the offer" [syn: {study}]