xenia
n.-
1 the ancient Greek code of hospitality (n.) C2 Proficiency Academic Historythe ancient Greek rule that a host must welcome, feed and protect any stranger who arrives — and that the guest must repay that welcome with good manners and a parting gift.
the ancient Greek institution of ritualised guest-friendship: a reciprocal bond of hospitality, gift-exchange and mutual obligation between host and guest, held sacred under the protection of Zeus Xenios.
ExampleIn Homer's world, xenia binds host and guest alike.
ExampleThe Phaeacians bathe Odysseus, feast him and send him home laden with treasure — xenia performed to the letter, and the last kindness he receives before Ithaca.
UsageXenia is uncountable: write "the rules of xenia" or "an act of xenia", never "a xenia". You will meet it mostly in writing about Homer, ancient Greece and classical literature.
Teacher's tipStudents meet this word in literature and history long before they meet it anywhere else. Teach it next to "xenophobia" — same Greek root, opposite instinct — and both tend to stick.
- hospitality
- guest friendship
- reciprocity
PitfallThe Cyclops shows xenia by asking Odysseus his name.The Cyclops mocks xenia by asking Odysseus his name.Xenia is an obligation, not a warm feeling. A host can perform it grudgingly or break it outright, so it is not a synonym for kindness.
-
2 in plant breeding (n.) C2 Proficiency Technical Botanythe effect that pollen from one plant has on the seed it fertilises — the father plant's influence shows in that same season's seeds, not in the next generation.
the immediate effect of foreign pollen on the endosperm of the seed it fertilises, so that the influence of the male parent is visible in the current generation rather than the following one.
ExampleXenia explains why one ear of corn can carry mixed-coloured kernels.
ExampleSweetcorn growers isolate their fields because xenia from a neighbouring crop of field corn will turn the kernels starchy in the same harvest.
UsageKeep xenia for the effect on the seed itself. The related term "metaxenia" covers the effect of pollen on the surrounding fruit tissue.
In the Greek world a knock at the door was a serious matter. The stranger outside might be a beggar, a merchant, a shipwrecked king — or a god walking the roads in disguise to see how mortals behaved. You could not know. So you did not ask. You brought him in, gave him water and a seat by the fire, fed him, and only afterwards enquired who he was and where he was bound. When he left you gave him a gift and took one in return, and the two households were bound to each other from that day forward.
The Greeks called this xenía, from the Ancient Greek xénos, a word that means stranger and guest and foreigner all at once, with no seam between them. Zeus himself stood behind the arrangement. In that office he was Zeus Xenios, protector of guests, and to rob a host or abuse a guest was not rudeness but sacrilege.
The great stories turn on it. Paris was a guest in the house of Menelaus when he left with his host's wife, and the Trojan War followed from that broken bond. Polyphemus asked Odysseus his name, promised him a guest-gift, and announced that the gift would be the courtesy of eating him last; he was blinded before morning. The suitors ate Penelope's stores for years and were cut down in her hall.
Botanists later borrowed the word for something considerably quieter. In 1881 Wilhelm Olbers Focke used xenia for the mark that foreign pollen leaves on the seed it fertilises — the guest's influence showing plainly in the host's tissue.
Original etymology written by Shinotoshi Nakamura.
The Greeks had many xenias for their guests.The Greeks had many customs of xenia for their guests.Xenia has no plural and takes no "a". When you need to count, count the customs, rules or acts — not the xenia.
Last updated August 1, 2026