z or Z (zē)
n., pl., z's, or Z's, also zs or Zs.

1. The 26th letter of the modern English alphabet.
2. Any of the speech sounds represented by the letter z.
3. The 26th in a series.
4. Something shaped like the letter Z.
5. z's Slang. Sleep.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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