Dx

DX

or D.X.

Radio.
  1. distance (used especially to designate difficult shortwave reception).

D & X

or D and X

  1. dilation and extraction.
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British Dictionary definitions for dx

DX

symbol for
  1. long distance
  2. (of a radio station) indicating that it is far away
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