On Definition Meaning MerriamWebsteroutfit of the night meaning is a phrase used to depict an outfit that is put on during the evening or for special occasions. represents love, passion, and romance. Therefore, an ootn showcases a fashionable and alluring attire that mirrors the love for clothing and embraces the nighttime vibe. Wearing an ootn can enhance one's confidence, make a statement, and display sophistication and charisma. No matter it's a glamorous dress or an chic suit, the ootn guarantees that you stand out and make a memorable impact at any night event.