What Does #OOTN Mean The #OOTN Meaning on Social Medianighttime outfit heart symbolism is a phrase used to depict a attire that is put on in the evening or for special occasions. Heart symbolizes love, emotion, and romance. Therefore, an ootn showcases an stylish and captivating attire that mirrors the affection for fashion and enjoys the nighttime vibe. Sporting an ootn can elevate your confidence, make a statement, and exude elegance and charisma. Regardless of it's a glamorous dress or an chic suit, the ootn will ensure that you stand out and leave a lasting impression at any evening event.