1. Sin: In the biblical story of Achan, "achan" refers to sin or transgression. Achan is a man in the Book of Joshua who disobeys God's command and steals forbidden items from Jericho, leading to the Israelites' defeat in battle. The term "achan" in this context is often used to describe a similar act of disobedience or betrayal.
2. Possession: In some contexts, "achan" can also refer to possession or ownership.
To understand the specific meaning of "achan" in a particular instance, you need more context.
Please provide me with the context where you encountered the word "achan" so I can help you understand its meaning more precisely.