noun, plural X's or Xs, x's or xs. 1.
the 24th letter of the English alphabet, a consonant.
any spoken sound
or combination of sounds represented by the letter X
as in xylene, box,
something having the shape of an X .
a written or printed representation of the letter X or x.
a device, as a printer's type, for reproducing the letter X or x.
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source