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1. the cardinal number that is the sum of ten and three and is a prime number
2. a numeral, 13, XIII, etc., representing this number
3. the amount or quantity that is three more than ten; baker's dozen


(religion, spiritualism, and occult)

Although considered an unlucky number by some, thirteen should in fact be thought of as lucky. There are thirteen moons in the year—making it the number of the Moon Goddess; thirteen is the traditional number for a Witches' coven; in Christianity Jesus had twelve disciples, for a total of thirteen; in alchemy it is the number of necromancy—of bringing the dead back to life; a "baker's dozen" includes an extra item, or thirteen; according to Pythagoras, adding one to twelve creates the unlimited number of thirteen, and through this formula miracles may take place; in the system of gematria found in the Kabbalah, thirteen is equated with "love of unity."

Some ascribe the belief that thirteen is unlucky to the fact that there were thirteen who sat down to the Last Supper, but the belief is far older than the beginnings of Christianity. The Romans, for example, associated the number with death and misfortune. Twelve is considered a perfect number (there are twelve hours in the day, twelve in the night, twelve months in the year, twelve signs of the zodiac,

twelve tribes of Israel, etc.); by going beyond that, to thirteen, one leaves the beneficence of the stable number and invites bad luck.


number attending Last Supper, including Judas; considered unlucky number. [Christian Hist.: Brewer Dictionary, 1075; Western Folklore: Misc.]
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Not to say that XIII doesn't have its merits; for example I particularly enjoyed the stealth missions to rescue a general from a frozen army base.
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We are very pleased to recognize Ron Howard with the Critics' Choice LOUIS XIII Genius Award," said Ludovic du Plessis, Global Executive Director, LOUIS XIII.
Since 1874, Louis XIII has been the king of cognacs and the cognac of kings.
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Qatar endeavours to progress development-centred globalisation in the region and beyond as host of Unctad XIII, and president of Unctad for the next four years.
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Peter's but were then moved elsewhere, among them: Eugene IV, Callistus III, Pius II, Alexander VI, Leo X, Hadrian VI, Pius IV, Pius V, Clement VIII, Paul V, Gregory XV, Innocent X, Clement IX, Benedict XIII, and Clement XIV.