:a thing that is expensive and enjoyable but not essential;剑桥高阶辞典如此解释:something expensive which is pleasant to have but is not necessary;韦伯斯特辞典的解释则是:something adding to pleasure or comfort but not absolutely necessary。纵观这三本辞典,luxury的含义大致有三个重点:好的、贵的、非必需的。