1. (a.) Showing keen mental discernment; shrewd\; skilled in following a trail.

2. (a.) Hence, of quick intellectual perceptions; of keen penetration and judgment; discerning and judicious; knowing; far-sighted; shrewd; sage; wise; as, a sagacious man; a sagacious remark.

acute all-knowing anticipant anticipatory apperceptive appercipient apprehending apprehensive argute astute aware blase cagey clairvoyant clever cogent cognizant cosmopolitan cosmopolite critical discerning discriminating divinatory experienced far-seeing farseeing farsighted forehanded foreknowing foreseeing foresighted forethoughted forethoughtful gnostic heady incisive insightful intelligent intuitive judicious knowing knowledgeable longheaded longsighted mature matured mindful not born yesterday old omniscient penetrating perceptive percipient perspicacious perspicuous piercing practiced precognitive precognizant prehensile prepared prescient provident providential prudent ready ripe ripened sage sapient savvy seasoned sensible shrewd smart sophic sophisticated trenchant tried tried and true understanding veteran wise world-wise worldly worldly-wise