[shan-uh n]
  1. Claude El·wood [el-woo d] /ˈɛlˌwʊd/, 1916–2001, U.S. applied mathematician: early developer of information theory.
  2. a river flowing SW from N Ireland to the Atlantic: the principal river of Ireland. 240 miles (386 km) long.
  3. international airport in W Ireland, near Limerick.
  4. a female given name. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for shannon


  1. a river in the Republic of Ireland, rising in NW Co Cavan and flowing south to the Atlantic by an estuary 113 km (70 miles) long: the longest river in the Republic of Ireland. Length: 260 km (161 miles)


  1. Claude (Elwood). 1916–2000, US mathematician, who first developed information theory
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 shannon


river in Ireland, the name is something like "old man river," from a Proto-Celtic word related to Irish sean "old" (see senile).

Online Etymology Dictionary, © 2010 Douglas Harper