What Does #OOTN Mean The #OOTN Meaning on Social Mediaoutfit of the night heart symbolism is a phrase used to describe a ensemble that is put on during the evening or for special occasions. represents love, passion, and affection. Therefore, an ootn showcases a fashionable and captivating outfit that mirrors one's affection for clothing and enjoys the evening vibe. Sporting an ootn can enhance your confidence, make an impression, and exude elegance and charisma. Regardless of it's an glamorous dress or a chic suit, the ootn guarantees that you catch everyone's attention and make a memorable impact at any night event.