D defs.my
Entry 4 senses Webster, 1913

Acuteness

· A·cute·ness · IPA /əkjˈuːtnəs/
01 n. The quality of being acute or pointed; sharpness; as, the acuteness of an angle.
  1. 1.
    The quality of being acute or pointed; sharpness; as, the acuteness of an angle.
  2. 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. 3.
    Shrillness; high pitch; -- said of sounds.
  4. 4.
    Violence of a disease, which brings it speedily to a crisis.(Med.)