Oxidize/ˈɑːksɪdaɪz/ Definition 1 of 2Pro Tip 1/3Non-living Things Oxidize usually refers to non-living things like metals, not biological organisms. The statue oxidizes over time due to rain. Pro Tip 2/3Natural Process Oxidize often implies a natural, gradual process, not something quick or instant. Silverware tends to oxidize and tarnish with age. Pro Tip 3/3Negative Connotation The term can imply damage or degradation, as with rust or corrosion. The old car's body has started to oxidize.