le·ger·i·ty \lə̇ˈjerəd.ē\noun (-es) Etymology: Middle French legereté, from Old French, lightness, from leger, legier light in weight (from — assumed — Vulgar Latin leviarius, from Latin levis) + -té -ty — more at light (in weight) : a mental or physical agility and quickness : nimbleness < the legerity of the French mind made the … visitor quick to comprehend his desire for solitude — Elinor Wylie >