Noun
The quality of being acute or pointed; sharpness; as, the acuteness of an angle.
The faculty of nice discernment or perception; acumen; keenness; sharpness; sensitiveness; -- applied to the senses, or the understanding. By acuteness of feeling, we perceive small objects or slight impressions: by acuteness of intellect, we discern nice distinctions.
Shrillness; high pitch; -- said of sounds.
Violence of a disease, which brings it speedily to a crisis.
Source: Webster's dictionaryhe argued with great acuteness Source: Internet
I admired the keenness of his mind Source: Internet
dogs have a remarkable acuteness of smell Source: Internet