noun

• (chiefly historical) A roadside inn, usually having a central courtyard where caravans (see sense 3) can rest, providing accommodation for travellers along trade routes in Asia and North Africa.
  "A dervise travelling through Tartary, being arrived at the town of Balk, went into the king's palace by mistake, as thinking it to be a public inn, or caravansary. […] It happened that the king himself passed through the gallery during this debate, and, smiling at the mistake of the dervise, asked him how he could possibly be so dull as not to distinguish a palace from a caravansary? […] 'Ah, Sir,' said the dervise, a house that changes its inhabitants so often, and receives such a perpetual succession of guests, is not a palace, but a caravansary.'"
• (by extension) A place resembling a caravanserai (sense 1) as being a place for resting temporarily, or a meeting place (especially one that is busy, or where people of different cultures encounter each other).
  "Conſider, I beſeech you, vvhat proviſion and accommodation, the Author of our being has prepared for us, that vve might not go on our vvay ſorrovving—hovv many caravanſera's of reſt—vvhat povvers and faculties he has given us for taking it—vvhat apt objects he has placed in our vvay to entertain us; […]"
• (by extension) Synonym of caravan (“a convoy of travellers, their cargo and vehicles, and pack animals”).
  "There they go, our brothers who have been educated at public schools and universities, mounting those steps, passing in and out of those doors,[…]. It is a solemn sight always—a procession, like a caravanserai crossing a desert."
• (by extension, archaic) A hostelry, an inn; also (humorous), an (upscale) hotel.
  "By the bye it is as well to mention, for the benefit of the inexperienced, that there are no Inns in Ireland; all are hotels, from the lowest road cabin to the splendid caravanserai, with all its appurtenances of luxury and ease."