[ U ] behaviour in which you spend more money than you need to奢侈,铺张
I think she was shocked by my extravagance.我想,我太铺张了,她一定感到很震惊。
[ C ] something expensive that you buy even though you do not need it奢侈品,奢华物
Perfume is my greatest extravagance.香水是我最大的奢侈品。