B1
a small, flat, usually round piece of metal used as money
Dictionary examples:
I tried to buy happiness with a coin, but the vending machine was out of order. (0.0)
I save all my coins in a jar. One day, I'll buy a jar factory! (0.0)
The vending machine rejected my coin. Even machines don't want my money! (0.0)
gold coins (16.1)
The machine takes dollar coins. (16.2)
I asked for ten dollars in coins. (17.2)
He collects old coins. (19.0)
The one dollar coin has never become popular. (31.0)
a 10p/ten pence coin (51.2)
a Canadian ten-cent coin (79.6)