noun
a reddish-brown color resembling that of iron oxide
adjective
having a reddish-brown color resembling that of iron oxide; affected by rust
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The old pipes were covered in a layer of rusty corrosion.
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I found a rusty old bike in the garage that I want to fix up.
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His jump shot is so rusty, he needs to practice more.
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After years of neglect, her skills had become rusty and needed to be sharpened.