J, j

[ jey ]
/ dʒeɪ /

noun, plural J's or Js, j's or js.

the tenth letter of the English alphabet, a consonant.
any spoken sound represented by the letter J or j, as in just, major, or rajah.
something having the shape of a J.
a written or printed representation of the letter J or j.
a device, as a printer's type, for reproducing the letter J or j.

j

Symbol.

Mathematics. a unit vector on the y-axis of a coordinate system.
Engineering. the imaginary number .

J

Physics. joule; joules.Also j

J

Symbol.

the tenth in order or in a series, or, when I is omitted, the ninth.
(sometimes lowercase) the medieval Roman numeral for 1.

J.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for j


British Dictionary definitions for j

j

symbol for

maths the unit vector along the y -axis
Also called: i obsolete the imaginary number √–1

noun plural j's, J's or Js

the tenth letter and seventh consonant of the modern English alphabet
a speech sound represented by this letter, in English usually a voiced palato-alveolar affricate, as in jam

J

symbol for

cards jack
joule(s)
current density

abbreviation for

Japan (international car registration)
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

Word Origin and History for j

J

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for j

J

abbr.

joule

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for j

J

Abbreviation of joule
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.