the power or faculty of the mind by which one knows or understands, as distinguished from that by which one feels and that by which one wills; the understanding; the faculty of thinking and acquiring knowledge.

capacity for thinking and acquiring knowledge, esp. of a high or complex order; mental capacity.

a particular mind or intelligence, esp. of a high order.

a person possessing a great capacity for thought and knowledge.

minds collectively, as of a number of persons or the persons themselves.

noun

ignorance

noun

ability , acumen , brains , cerebration , comprehension , egghead * , genius , intellectual , intellectuality , intelligence , intuition , judgment , mentality , mind , psyche , pundit , reason , savvy , sense , smarts , thinker , understanding , what it takes , wits , brain , brainpower , wit , acquaintance , cognition , entelechy , information , luminosity , noesis , perspicacity , perspicuity , profundity , rationality , sagacity , sapience