(rustier, rustiest)
1.
A ~ metal object such as a car or a machine is covered with rust, which is a brown substance that forms on iron or steel when it comes into contact with water.
...a ~ iron gate.
ADJ: usu ADJ n
2.
If a skill that you have or your knowledge of something is ~, it is not as good as it used to be, because you have not used it for a long time.
You may be a little ~, but past experience and teaching skills won’t have been lost.
ADJ
3.
Rusty is sometimes used to describe things that are reddish-brown in colour.
ADJ