1. Tail: It primarily refers to the tail of an animal. This is its most common usage.
2. End (figuratively): Less commonly, it can be used metaphorically to refer to the end of something, particularly the end of a task or a journey. For example, you might hear "dumna aa gaya" (ਦੁਮਨਾ ਆ ਗਿਆ) meaning "the end has come" or "we've reached the end."
Important Note: It's essential to understand the context to determine the correct meaning of "dumna." In most cases, it will be referring to the tail of an animal.