Most auroral refers to something that is vibrant, bright and lively, usually used in context of the northern lights. The antonyms of the word "most auroral" can range from completely opposite to moderately different. Dark, dull, and gloomy are some of the antonyms that come to mind. Other antonyms include lifeless, somber, bleak, and drab. These words highlight the lack of color, vibrancy and vitality of the place or entity. While most auroral signifies a certain degree of positivity and energy, antonyms for this term represent a negative attitude or atmosphere. These antonyms can be used to describe anything from a mood to a physical location.