Webster's Revised Unabridged Dictionary · 1913

Acuteness

Acuteness , noun

1.
The quality of being acute or pointed; sharpness; as, the acuteness of an angle.
2.
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 fine distinctions.
Perhaps, also, he felt his professional acuteness interested in bringing it to a successful close. — Sir W. Scott
3.
Shrillness; high pitch; -- said of sounds.
4.
(Medicine) Violence of a disease, which brings it speedily to a crisis.