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noun Egyptian Religion.
  1. a goddess of fertility, the sister and wife of Osiris and mother of Horus, and usually represented as a woman with a cow's horns with the solar disk between them: later worshiped in the Greek and Roman empires.

Origin of Isis

< Latin < Greek Îsis < Egyptian 'st


  1. Islamic State in Iraq and al-Sham (or Islamic State in Iraq and Syria): a radical Sunni Muslim organization whose aim is to restore an Islamic state, or caliphate, in the region encompassing Syria, Lebanon, Israel, Jordan, the Palestinian territories, and southeastern Turkey.

Origin of ISIS

Arabic al-Sham, an ancient territory known in English as the Levant, an area on the E shores of the Mediterranean
Also called ISIL, IS
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for isis


  1. the local name for the River Thames at Oxford


  1. an ancient Egyptian fertility goddess, depicted as a woman with a cow's horns, between which was the disc of the sun; wife and sister of Osiris
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