Longman Dictionary of Contemporary English - luxury

~ n 1 very great comfort and pleasure, such as you get from expensive food, beautiful houses, cars etc  (Caviar for breakfast! I was not used to such luxury. | a life of luxury)  (They led a life of luxury, in a huge house in the countryside. | luxury apartment/flat/car etc (=expensive and large)) 2 something expensive that you do not need, but you buy for pleasure and enjoyment  (We can't afford luxuries like piano lessons any more.)  (- see also in the lap of luxury lap1 (4), -compare necessity (1))