As an adjective:
* It describes someone or something considered to be unconverted or not belonging to a recognized religion, especially a non-Christian religion.
* Example: "The explorers encountered heathen tribes in the jungle."
As a noun:
* It refers to a person who is considered to be unconverted or not belonging to a recognized religion.
* Example: "Some consider those who don't believe in God to be heathens."
It's important to note that the word "heathen" can be offensive and should be used with caution.