1 choice or costly surroundings, possessions, food, etc.; luxuriousness (a life of luxury).
2 something desirable for comfort or enjoyment, but not indispensable.
3 (attrib.) providing great comfort, expensive (a luxury flat; a luxury holiday).
Etymology: ME f. OF luxurie, luxure f. L luxuria f. luxus abundance
Useful english dictionary. 2012.