Dictionary.com
definitions

September Massacre

noun
  1. (in the French Revolution) the massacre of royalists and other inmates of the prisons of Paris, September 2–6, 1792.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for september massacre

September Massacre

noun
  1. (during the French Revolution) the massacre of royalist prisoners and others in Paris between Sept 2 and 6, 1792
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