(1):

(n.) Lechery; lust.

(2):

(n.) A free indulgence in costly food, dress, furniture, or anything expensive which gratifies the appetites or tastes.

(3):

(n.) 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.

(4):

(n.) Luxuriance; exuberance.