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1. Combined with or having undergone a chemical reaction with oxygen
   "the oxidized form of iodine";
   - oxidised [Brit]

1. Enter into a combination with oxygen or become converted into an oxide
   "This metal oxidizes easily";
   - oxidise [Brit], oxidate
    
2. (chemistry) add oxygen to or combine with oxygen
   - oxidise [Brit], oxidate
    
3. (chemistry) increase the valence (or the positive charge) of an element by removing electrons
   - oxidise [Brit]

Type of: alter, change, modify

Antonym: deoxidise [Brit]

Encyclopedia: Oxidized