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USM

or U.S.M.

See more synonyms for USM on Thesaurus.com
  1. United States Mail.
  2. United States Marines.
  3. United States Mint.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for usm

USM

abbreviation for
  1. stock exchange Unlisted Securities Market
  2. underwater-to-surface missile
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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