• synonyms


[air-eez, -ee-eez]
noun, genitive A·ri·e·tis [uh-rahy-i-tis] /əˈraɪ ɪ tɪs/.
  1. Astronomy. the Ram, a zodiacal constellation between Pisces and Taurus.
  2. Astrology.
    1. the first sign of the zodiac: the cardinal fire sign.
    2. a person born under this sign, usually between March 21st and April 19th.
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Origin of Aries

1350–1400; Middle English < Latin: ram
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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noun Latin genitive Arietis (əˈraɪɪtɪs)
  1. astronomy a small zodiacal constellation in the N hemisphere lying between Taurus and Pisces on the ecliptic and having a second-magnitude star
  2. astrology
    1. Also called: the Ramthe first sign of the zodiac, symbol ♈, having a cardinal fire classification, ruled by the planet Mars. The sun is in this sign between about March 21 and April 19
    2. a person born during the period when the sun is in this sign
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  1. astrology born under or characteristic of Aries
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Also (for senses 2b, 3): Arien (ˈɛərɪən)

Word Origin

C14: from Latin: ram
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

Word Origin and History for aries


zodiac constellation usually identified as "the Ram," late Old English, from Latin aires "ram" (cf. arietare "to butt"), from a PIE root meaning "spring, jump" (cf. Lithuanian erytis, Old Church Slavonic jarici, Armenian oroj "lamb;" Greek eriphos, Old Irish heirp "kid"). Meaning "person born under the sign of Aries" is from 1894; they also have been called Arian (1917).

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Online Etymology Dictionary, © 2010 Douglas Harper

aries in Science


  1. A constellation in the Northern Hemisphere near Taurus and Pisces. Aries (the Ram) is the first sign of the zodiac.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.