1. (a.) Having the power of sharp mental discernment; astute; clear-sighted\.

2. (a.) Fig.: Of acute discernment; keen.

acute all-knowing apperceptive appercipient apprehending apprehensive argute astute aware cagey cogent cognizant comprehending conscious discerning farseeing farsighted foreseeing foresighted forethoughted forethoughtful heady incisive insightful intelligent judicious knowing knowledgeable longheaded longsighted mindful omniscient penetrating perceptive percipient perspicuous piercing prehensile provident sagacious savvy sensible sharp-sighted sharp-witted shrewd trenchant understanding wise