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Leo

[lee-oh] /ˈli oʊ/
noun, genitive Leonis
[lee-oh-nis] /liˈoʊ nɪs/ (Show IPA),
for 1.
1.
Astronomy. the Lion, a zodiacal constellation between Virgo and Cancer, containing the bright star Regulus.
2.
Astrology.
  1. the fifth sign of the zodiac: the fixed fire sign.
  2. a person born under this sign, usually between July 23rd and August 22nd.
3.
a male given name: from a Greek word meaning “lion.”.

Leo I

[lee-oh; Italian le-aw] /ˈli oʊ; Italian ˈlɛ ɔ/
noun
1.
Saint ("Leo the Great") a.d. c390–461, Italian ecclesiastic: pope 440–461.

Leo II

noun
1.
Saint, died a.d. 683, Sicilian ecclesiastic: pope 682–683.

Leo III

noun
1.
Saint, a.d. c750–816, Italian ecclesiastic: pope 795–816.
2.
(“the Isaurian”), a.d. c680–741, Eastern Roman emperor 717–741.

Leo IV

noun
1.
Saint, died a.d. 855, Italian ecclesiastic: pope 847–855.

Leo V

noun
1.
flourished 10th century a.d, Italian ecclesiastic: pope 903.

Leo VI

noun
1.
pope a.d. 928.

Leo VII

noun
1.
died a.d. 939, Italian ecclesiastic: pope 936–939.

Leo VIII

noun
1.
died a.d. 965, Italian ecclesiastic: pope 963–965.

Leo IX

noun
1.
Saint (Bruno) 1002–54, German ecclesiastic: pope 1049–54.

Leo X

noun
1.
(Giovanni de'Medici) 1475–1521, Italian ecclesiastic: pope 1513–21 (son of Lorenzo de'Medici).

Leo XI

noun
1.
(Alessandro de'Medici) 1535–1605, Italian ecclesiastic: pope 1605.

Leo XII

noun
1.
(Annibale Francesco della Genga) 1760–1829, Italian ecclesiastic: pope 1823–29.

Leo XIII

noun
1.
(Giovanni Vincenzo Pecci) 1810–1903, Italian ecclesiastic: pope 1878–1903.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Leo

Leo1

/ˈliːəʊ/
noun
1.
a name for a lion, used in children's tales, fables, etc
Word Origin
from Latin: lion

Leo2

/ˈliːəʊ/
noun (Latin genitive) Leonis (liːˈəʊnɪs)
1.
(astronomy) a zodiacal constellation in the N hemisphere, lying between Cancer and Virgo on the ecliptic, that contains the star Regulus and the radiant of the Leonid meteor shower
2.
(astrology)
  1. Also called the Lion. the fifth sign of the zodiac, symbol ♌, having a fixed fire classification and ruled by the sun. The sun is in this sign between about July 23 and Aug 22
  2. a person born during a period when the sun is in this sign
adjective
3.
(astrology) born under or characteristic of Leo
Also (for senses 2b, 3) Leonian (liːˈəʊnɪən)

LEO

abbreviation
1.
low earth orbit

Leo I

/ˈliːəʊ/
noun
1.
Saint, known as Leo the Great. ?390–461 ad, pope (440–461). He extended the authority of the papacy in the West and persuaded Attila not to attack Rome (452). Feast day: Nov 10 or Feb 18

Leo III

noun
1.
called the Isaurian. ?675–741 ad, Byzantine emperor (717–41): he checked Arab expansionism and began the policy of iconoclasm, which divided the empire for the next century
2.
Saint. ?750–816 ad, pope (795–816). He crowned Charlemagne emperor of the Romans (800). Feast day: June 12

Leo IX

noun
1.
Saint, original name Bruno of Egisheim. 1002–54, pope (1049–54): first of the great medieval reforming popes. Conflict with the Eastern Church led to the schism between Rome and Constantinople (1054). Feast day: April 19

Leo X

noun
1.
original name Giovanni de' Medici. 1475–1521, pope (1513–21): noted for his patronage of Renaissance art and learning; excommunicated Luther (1521)

Leo XIII

noun
1.
original name Gioacchino Pecci. 1810–1903, pope (1878–1903). His many important encyclicals include Rerum novarum (1891) on the need for Roman Catholics to take action on various social problems
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Leo

zodiac constellation, late Old English, from Latin leo "lion" (see lion). Meaning "person born under the sign of Leo" is from 1894. Leonid "meteor which appears to radiate from Leo" is from 1868. The annual shower peaks Nov. 14.

Online Etymology Dictionary, © 2010 Douglas Harper
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Leo in Science
Leo
  (lē'ō)   
A constellation in the Northern Hemisphere near Cancer and Virgo. Leo (the Lion) contains the bright star Regulus and is the fifth sign of the zodiac.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Leo in Technology

1. A general-purpose systems language, syntactically like Pascal and Y, semantically like C.
["The Leo Programming Language", G. Townsend, CS TR 84-7, U Arizona 1984].
(1996-02-06)
2. A general data management environment which can show user-created relationships among any kind data. It can also be used as an outlining editor as it embeds the noweb and CWEB markup languages in an outline context.
Leo is written in pure Python using Tk/tcl and so runs on Windows, Linux and MacOS X. It isdistributed under the Python License.
(2006-07-12)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Related Abbreviations for Leo

LEO

  1. Leo
  2. low earth orbit
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Encyclopedia Article for Leo

Leo IV

Byzantine emperor whose reign marked a transition between the period of Iconoclasm and the restoration of the icons

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Leo V

pope from August to September 903. Elected while a priest to succeed Pope Benedict IV, Leo assumed the pontificate in a dark period of papal history. He was deposed and imprisoned by the antipope Christopher. Leo was perhaps murdered, either by Christopher or his successor, Pope Sergius III (904-911).

Learn more about Leo V with a free trial on Britannica.com

Leo VI

pope from May to December 928. He was Pope John VIII's prime minister and later a cardinal priest when elected by the senatrix Marozia, then head of the powerful Roman Crescentii family, who deposed and imprisoned Leo's predecessor, Pope John X. His principal act was the regulation of the jurisdiction of the hierarchy in Dalmatia.

Learn more about Leo VI with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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