[n] the process of thinking (especially thinking carefully); "thinking always made him frown"; "she paused for thought"
[n] the content of cognition; the main thing you are thinking about; "it was not a good idea"; "the thought never entered my mind"
[n] a personal belief or judgment that is not founded on proof or certainty; "my opinion differs from yours"; "what are your thoughts on Haiti?"
[n] the organized beliefs of a period or group or individual; "19th century thought"; "Darwinian thought"