Wordnet 3.0
NOUN (2)
1.
the condition of being coated or clogged with rust;
2.
ineptitude or awkwardness as a consequence of age or lack of practice;
- Example: "his rustiness showed when he was asked to speed up"
The Collaborative International Dictionary of English v.0.48:
Rustiness \Rust"i*ness\, n.
The quality or state of being rusty.
[1913 Webster]
WordNet (r) 3.0 (2006):
rustiness
n 1: the condition of being coated or clogged with rust
2: ineptitude or awkwardness as a consequence of age or lack of
practice; "his rustiness showed when he was asked to speed
up"