z

Z, z

[zee or, esp. British, zed; Archaic iz-erd]
noun, plural Z's or Zs, z's or zs.
1.
the 26th letter of the English alphabet, a consonant.
2.
any spoken sound represented by the letter Z or z, as in zero, zigzag, or buzzer.
3.
something having the shape of a Z .
4.
a written or printed representation of the letter Z or z.
5.
a device, as a printer's type, for reproducing the letter Z or z.
Dictionary.com Unabridged

Z

1.
Astronomy. zenith distance.
2.

Z

Symbol.
1.
the 26th in order or in a series, or, when I is omitted, the 25th.
2.
(sometimes lowercase) the medieval Roman numeral for 2000. Compare Roman numerals.
3.
Chemistry, Physics. atomic number.
4.
Electricity, impedance.

z

z

Symbol, Mathematics.
1.
an unknown quantity or variable.
2.
(in Cartesian coordinates) the z- axis.

z.

Z0

Symbol, Physics. Z-zero particle.

z's

[zeez]
noun (used with a plural verb) Slang.
sleep (often used with grab, catch, etc.): to grab some z's before dinner.
Also, Z's.


Origin:
1960–65; from the conventional use of a series of z's to represent snoring

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
z or Z (zɛd, US ziː, zɛd, US ziː)
 
n , pl z's, Z's, Zs
1.  the 26th and last letter and the 20th consonant of the modern English alphabet
2.  a speech sound represented by this letter, in English usually a voiced alveolar fricative, as in zip
3.  a.  something shaped like a Z
 b.  (in combination): a Z-bend in a road
 
Z or Z
 
n

z
 
symbol for
1.  the z-axis or a coordinate measured along the z-axis in a Cartesian or cylindrical coordinate system
2.  an algebraic variable

Z
 
symbol for
1.  any unknown, variable, or unspecified factor, number, person, or thing
2.  chem atomic number
3.  physics impedance
4.  zone
5.  currency zaïre
 
abbreviation for
6.  Zambia (international car registration)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

Z
not a native letter in O.E.; in Anglo-Fr. words it represents the "ts" sound (cf. Anglo-Fr. fiz, from L. filius, modern Fitz); late 13c. it began to be used for the voiced "s" sound and had fully taken that role by 1400. For letter name, see zed.
"Thou whoreson Zed, thou vnnecessary Letter." ["King Lear," II.ii.69]
Series of zs to represent a buzzing sound first attested 1852; zees "spell of sleep, a nap" is slang first recorded 1963, Amer.Eng. student slang.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

Z definition


/zed/ 1. (After Zermelo-Fränkel set theory) A specification language developed by the Programming Research Group at Oxford University around 1980. Z is used for describing and modelling computing systems. It is based on axiomatic set theory and first order predicate logic. Z is written using many non-ASCII symbols. It was used in the IBM CICS project.
See also Z++.
["Understanding Z", J.M. Spivey, Cambridge U Press 1988].
2. A stack-based, complex arithmetic simulation language from ZOLA Technologies.
(1995-08-11)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
Z
  1. atomic number

  2. impedance

  3. zenith distance

z.
  1. zero

  2. zone

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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American Heritage
Idioms & Phrases

z

see from soup to nuts (a to z).

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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