T'aarof, Ta'arof or Tarof () is a Persian form of civility emphasizing both self-deference and social rank, similar to the Chinese art of etiquette, limao. The term encompasses a range of social behaviours, from a man displaying etiquette by opening the door for a woman, to a group of colleagues standing on ceremony in front of a door that can permit the entry of only one at time, earnestly imploring the most senior to break the deadlock.