Money is a medium of exchange [something that is used to buy or trade things] that is widely accepted in transactions [actions of buying or selling something] and can be used to buy goods and services.
- When you go to a store and use coins or bills to purchase a toy, you are using money as a medium of exchange.
- If someone pays you with a $10 bill for doing a job, that bill is money that you can use to buy things you want.
Very Simple Definition:
Money is something we use to buy and sell things.
- When you want to buy a candy, you need money to pay for it.
- If you want to get a new toy, you give money to the store and they give you the toy.