pleonexia /pli.əˈnɛks.i.ə/ noun1 •Excessive or insatiable greed, avarice, covetousness, the desire to have more, a greedy desire for certain goods.There are two words in the Greek which set forth the nature of covetousness: 1. Pleonexia, which signifies an 'insatiable desire of getting the world.' Covetousness is a dry dropsy. — 1838 formspleonexias