in a way that involves spending a lot more money or using a lot more of something than you can afford or than is necessary 奢侈的；挥霍的；铺张浪费的 They do not live extravagantly. 他们过着奢侈的生活。
in a way that costs a lot more money than you can afford or is necessary 过于昂贵的 extravagantly expensive 极为昂贵
in a way that is very extreme or impressive but not reasonable or practical 无节制的；过分的；放肆的；不切实际的 extravagantly high hopes 奢望 She praised him extravagantly. 她夸奖他。