Wordnet 3.0
NOUN (2)
1. 
 a carefully considered thought about something; 
- Example: "his cogitations were dutifully recorded in his daybook"2. 
 attentive consideration and meditation; 
- Example: "after much cogitation he rejected the offer"[syn: cogitation, study]
The Collaborative International Dictionary of English v.0.48:
Cogitation \Cog`i*ta"tion\, n. [L. cogitatio: cf. F.
   cogitation.]
   The act of thinking; thought; meditation; contemplation.
   "Fixed in cogitation deep." --Milton.
   [1913 Webster]
WordNet (r) 3.0 (2006):
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: cogitation,
       study]