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British Dictionary definitions for open day

open day

noun
  1. an occasion on which an institution, such as a school, is open for inspection by the publicAlso called: at-home US and Canadian name: open house
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