Luxury, n.; pl. Luxuries.
Etymology: [L. luxuria, fr. luxus: cf. F. luxure.]
1. A free indulgence in costly food, dress, furniture, or anything expensive which gratifies the appetites or tastes. Riches expose a man to pride and luxury. Spectator.
2. Anything which pleases the senses, and is also costly, or difficult to obtain; an expensive rarity; as, silks, jewels, and rare fruits are luxuries; in some countries ice is a great luxury. He cut the side of a rock for a garden, and, by laying on it earth, furnished out a kind of luxury for a hermit. Addison.
3. Lechery; lust. [Obs.] Shak. Luxury is in wine and drunkenness. Chaucer.
4. Luxuriance; exuberance. [Obs.] Bacon.
1 more senses
Syn. -- Voluptuousness; epicurism; effeminacy; sensuality; lasciviousness; dainty; delicacy; gratification.
Shades of meaning
Fernald lists luxury only as an antonym, under frugality.
He lists it without comment; the entries above explain its neighbors.