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Otto IV

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noun
  1. c1175–1218, king of Germany 1208–15; emperor of the Holy Roman Empire 1209–15.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for otto iv

Otto IV

noun
  1. ?1175–1218. German king and Holy Roman Emperor (1198–1215): invaded S Italy (1210) but was later (1214) defeated by France and deposed
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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