There are at least 13 definitions of what is money, according to the scale in society.
Here are some forms that money interplay is experienced in our life
Money experienced as
2) As means of transactions
3) As a totalitarianism in the human feelings, where everything is compared with everything and measured with the total order of money.
4) As measure of human working activity
5) As raw material to organize business and group activity, or operational power (capital)
6) As constraint of debt in activities, or friction in production activities.
7) Conversely when in abundance, as measure of freedom in personal activities
8) As technology of exercising power of a minority of humans over the majority of humans
9) As a technique to create inequalities in the living standards and social power.
10) As means of persuasion
11) As macroscopic "temperature" of social activities
12) As means to regulate fair agreements, deals, etc
13) As embodied value of precious metals in the coins.
14) As difference of prices of same goods between different nations with different currencies.
15) As only the liquid part of the economic value of fixed assets, like real estate etc In other words in a society, money is only the smaller part of the total economic value or wealth, both for the individual or the public sector.
16) As a measure of how much a social entity (an individual or group of individuals) contribute to the civilizations versus how much the civilization contributes to the entity.
17) Lack of money is deprivation of freedom from the need and a high monetary wealth in society from an individual or group of individuals can be an indirect way of deprivation of the freedom from the need of other people that do not have this wealth , and cannot access goods and services of the civilization.
At each organizational scale a) Individual or Household b) Enterprise c) Domestic Economy d) Global Economy, the experience and implications of money are different.
But probably the most enlightening definition of money is that money is a technology of exercising of power from human beings to human beings and objects.
Therefore the morality related to money is almost identical to the morality related to the exercise of power from human beings to human beings.
And of course a good question is "What is the role of money and its power in society?"
The next thoughts seem to be the answer