It seems like there might be a slight misunderstanding with the word "asin." The term "asin" does not refer to anything in standard English, nor does it relate to the seventh month of the Hindu calendar. However, I believe you might be referring to "Ashwin," which is the seventh month of the Hindu calendar. I will explain "Ashwin" instead.
Definition: Ashwin is a noun that refers to the seventh month of the Hindu lunar calendar. It typically falls around September to October in the Gregorian calendar.
In more advanced discussions, you might encounter phrases like "Ashwin month festivities" or "the significance of Ashwin in Hindu culture," where you delve into the traditions and rituals associated with this time.