Definition: The word 'aliakmon' is a term in Greek that means "God." It refers to the Almighty, considered by many to be the most powerful deity in the Bible. Definition: The word "aliakmon" has its roots in the ancient Greek words for gods, meaning "God," and "Alma" or "Father." In the Hebrew Bible, it is used metaphorically as a term for God. It denotes that He is the ultimate power and authority over all things.