Z, z

[ zee or, esp. British, zed; Archaic iz-erd ]
/ zi or, esp. British, zɛd; Archaic ˈɪz ərd /

noun, plural Z's or Zs, z's or zs.

the 26th letter of the English alphabet, a consonant.
any spoken sound represented by the letter Z or z, as in zero, zigzag, or buzzer.
something having the shape of a Z.
a written or printed representation of the letter Z or z.
a device, as a printer's type, for reproducing the letter Z or z.

Definition for z (2 of 9)

Definition for z (3 of 9)

z


Symbol, Mathematics.

an unknown quantity or variable.
(in Cartesian coordinates) the z-axis.

Definition for z (4 of 9)

Z


Astronomy. zenith distance.

Definition for z (5 of 9)

Z


Symbol.

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

Definition for z (6 of 9)

Z0


Symbol, Physics. Z-zero particle.

Definition for z (7 of 9)

Definition for z (8 of 9)

z's

or Z's

[ zeez ]
/ ziz /

noun (used with a plural verb) Slang.

sleep (often used with grab, catch, etc.): to grab some z's before dinner.

Origin of z's

First recorded in 1960–65; from the conventional use of a series of z's to represent snoring

Definition for z (9 of 9)

zeta

[ zey-tuh, zee- ]
/ ˈzeɪ tə, ˈzi- /

noun

the sixth letter of the Greek alphabet (Z, ζ).
the consonant sound represented by this letter.

Origin of zeta

First recorded in 1820–30, zeta is from the Greek word zêta
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for z

British Dictionary definitions for z (1 of 6)

z

/ maths /

symbol for

the z- axis or a coordinate measured along the z- axis in a Cartesian or cylindrical coordinate system
an algebraic variable

British Dictionary definitions for z (2 of 6)

z

Z

/ (zɛd, US ziː) /

noun plural z's, Z's or Zs

the 26th and last letter and the 20th consonant of the modern English alphabet
a speech sound represented by this letter, in English usually a voiced alveolar fricative, as in zip
  1. something shaped like a Z
  2. (in combination)a Z-bend in a road

British Dictionary definitions for z (3 of 6)

Z


symbol for

any unknown, variable, or unspecified factor, number, person, or thing
chem atomic number
physics impedance
zone
currency zaïre

abbreviation for

Zambia (international car registration)

British Dictionary definitions for z (4 of 6)

zeta

/ (ˈziːtə) /

noun

the sixth letter in the Greek alphabet (Ζ, ζ), a consonant, transliterated as z

Word Origin for zeta

from Greek, of Semitic origin; compare Hebrew sādhē

British Dictionary definitions for z (5 of 6)

Zeta

/ (ˈziːtə) /

noun

(foll by the genitive case of a specified constellation) the sixth brightest star in a constellationZeta Tauri

British Dictionary definitions for z (6 of 6)

ZETA

/ (ˈziːtə) /

noun

a torus-shaped apparatus used for research in the 1950s and early 1960s on controlled thermonuclear reactions and plasma physics

Word Origin for ZETA

C20: from z (ero-) e (nergy) t (hermonuclear) a (pparatus)
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

Medicine definitions for z

zeta

[ zātə, zē- ]

n.

The sixth letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with z

z


see from soup to nuts (a to z).

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.