1. to combine with oxygen or lose electrons in a chemical reaction
Usage: British spelling; American English uses 'oxidize'; chemistry term
2. to cause to rust or corrode through exposure to oxygen
Usage: British spelling; American English uses 'oxidize'

Examples

• Iron will oxidise when exposed to moisture and air.
• The metal surface began to oxidise, turning a reddish-brown colour.
• In the reaction, hydrogen is oxidised while chlorine is reduced.
• Copper oxidises over time, developing a green patina.
• The battery's terminals oxidised due to humidity in the storage room.
• Scientists oxidise organic compounds to study their chemical properties.