Webster 1913 Edition
The quality of being sagacious; quickness or acuteness of sense perceptions; keenness of discernment or penetration with soundness of judgment; shrewdness.
Some [brutes] show that nice
sagacityimproved by generous education.
Syn. – Penetration; shrewdness; judiciousness.–
Webster 1828 Edition
1.Quickness or acuteness of scent; applied to animals.
2.Quickness or acuteness of discernment or penetration; readiness of apprehension; the faculty of readily discerning and distinguishing ideas, and of separating truth from falsehood.
Sagacity finds out the intermediate ideas, to discover what connection there is in each link of the chain.