the power to reason (contrasted with emotions and instinct)

capability of the mind; someone with capable mind

something reflected, especially and image reflected in a mirror or in water; thought (the usual word)

thought, thinking

(an instance of) speculating; (a business deal as a result of) speculating

theory, guess

of think; the act, process, of thinking; an idea, opinion, intention etc formed by thinking; consideration; mental attention

formation of mental objects