1. noun /kɔɪn/
a) A piece of currency, usually metallic and in the shape of a disc, but sometimes polygonal, or with a hole in the middle.
...the coins were of all countries and sizes - doubloons, and louis dors, and guineas, and pieces of eight...
2. verb /kɔɪn/
a) to create coins.
Over the last century the advance in science has led to many new words being coined.
b) to make up or invent, and establish
Wikipedia foundation.