adjective
The definition of pecuniary is something related to money.
When you are interested in a job only because of the money, this is an example of a situation where you are driven by pecuniary interests.
pecuniary

- of or involving money
- involving a money penalty, or fine: a pecuniary offense
Origin of pecuniary
Classical Latin pecuniarius from pecunia, money from pecus, cattle: see feepecuniary

adjective
- Of or relating to money: a pecuniary loss; pecuniary motives.
- Requiring payment of money: a pecuniary offense.
Origin of pecuniary
Latin pecūniārius from pecūnia property, wealth ; see peku- in Indo-European roots.pecuniary

Origin
From Latin pecÅ«niÄrius, from pecÅ«nia (“money").
pecuniary - Legal Definition

adj
Having to do with, or
relating to, money.