Wordnet 3.0
NOUN (2)
1.
the quality of being sharp or harsh to the senses;
- Example: "the shrillness of her hair color"2.
having the timbre of a loud high-pitched sound;
[syn: shrillness, stridence, stridency]
The Collaborative International Dictionary of English v.0.48:
Shrillness \Shrill"ness\, n.
The quality or state of being shrill.
[1913 Webster]
WordNet (r) 3.0 (2006):
shrillness
n 1: the quality of being sharp or harsh to the senses; "the
shrillness of her hair color"
2: having the timbre of a loud high-pitched sound [syn:
shrillness, stridence, stridency]