What is Luxury ?
Luxury is (noun) 1. great comfort He lived a life of great luxury. A hot bath is a real luxury after two weeks camping in the mountains. to stay in a luxury hotel to stay in a five-star hotel, a very good hotel with luxurious rooms and higher prices 2. a thing which is pleasant to have, but not necessary She often buys little luxuries for dessert on Friday nights. (NOTE: The plural in this meaning is luxuries)
source: Easier English, Student Dictionary Upper Intermediate Level