O.H.M.S.


abbreviation
  1. On His Majesty's Service; On Her Majesty's Service.

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British Dictionary definitions for OHMS

OHMS

abbreviation for(in Britain and the dominions of the Commonwealth)
  1. On Her (or His) Majesty's Service

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