Rusty/ˈrʌsti/ Definition 1 of 3Pro Tip 1/3Physical Decline Describes objects that deteriorate, emphasizing neglect or age. My bicycle in the shed has gotten completely rusty. Pro Tip 2/3Visual Texture Evokes a rough and aged surface, can imply lack of care. The rusty chain of the swing set creaked loudly. Pro Tip 3/3Impacts Usability A rusty item may not function well, suggesting it's unreliable. Be careful, that rusty knife is very dull and fragile.