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English definition of “rusty”

rusty

adjective  /ˈrʌs·ti/ us  
(esp. of a person) not as good at knowing or doing something as you once were, because you have not practiced it in a long time: We’re a little rusty after having the summer off.
(of the surface of something made of iron or steel) covered with a red-brown substance that formed as a result of decay caused by reacting with air and water: People would toss their soda cans into rusty old barrels.
(Definition of rusty from the Cambridge Academic Content Dictionary © Cambridge University Press)
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