Easton's Bible Dictionary (or "thoughts, " as the Chaldee word in Dan. 7:28 literally means), earnest meditation.

Multi-Version Concordance Cogitations (1 Occurrence) Daniel 7:28 Hitherto is the end of the matter. As for me Daniel, my cogitations much troubled me, and my countenance changed in me: but I kept the matter in my heart. (KJV WBS)