What Does #OOTN Mean The #OOTN Meaning on Social Mediaootn heart importance is a term used to describe a attire that is worn during the evening or for special occasions. represents love, passion, and romance. Therefore, an ootn showcases a fashionable and alluring attire that mirrors one's affection for clothing and enjoys the evening vibe. Wearing an ootn can boost your confidence, make a statement, and display sophistication and charm. Regardless of it's a glamorous dress or a chic suit, the ootn ensures that you catch everyone's attention and leave a lasting impression at any evening event.