treattreat /triːt/ verb [transitiveT]1to deal with someone or something in a particular wayWe treat all complaints very seriously.
treat somebody/something asProceeds from the asset transfers won’t be treated as income.
Some information ought to betreated as confidential.
2to put a special substance on something to clean or protect it, or to make it safeThe convention insists that countries should treat their own hazardous wastes.