Definition of: acumen

(ə·ky′mən) noun
Quickness of insight or discernment; keenness of intellect. [<L, point, sharpness (of the mind) < acuere sharpen] Synonyms: acuteness, cleverness, discernment, insight, keenness, perception, perspicacity, sagacity, sharpness, shrewdness. Sharpness, acuteness, and insight, however keen, and perception, however deep, fall short of the meaning of acumen, which belongs to an astute and discriminating mind.Cleverness is a practical aptitude for study or learning. Perspicacity is the power to see clearly and quickly through that which is difficult or involved. Compare SAGACIOUS. Antonyms: dullness, obtuseness, stupidity.