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property noun (QUALITY) âº [ C ] a quality in a substance or material, especially one that means that it can be used in a particular way: One of the properties of copper is that it conducts heat and electricity very well. We value herbs for their taste, but we forget that they also have medicinal properties.
A chemical property is a characteristic that can only be determined by changing the chemical identity of a substance. What we started with was iron, but when it reacts with the oxygen in the air, it turns into iron oxide, or rust.