Definition of "Thought" :

noun: the process of using your mind to consider something carefully

"She paused for thought."

noun: the content of cognition; the main thing you are thinking about

"The thought never entered my mind."

noun: a personal belief or judgment that is not founded on proof or certainty

"What are your thoughts on Haiti?."

noun: the organized beliefs of a period or group or individual

"19th century thought."