J

¹

or j

[ jey ]

noun

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

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

J

²

abbreviation for

1. Jewish ( def 1 ).
2. Physics. joule; joules. Also j

J

³

Symbol.

1. the tenth in order or in a series.
2. (sometimes lowercase) the medieval Roman numeral for 1. Compare Roman numerals.

j

⁴

Symbol.

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

J.

⁵

abbreviation for

1. Cards. Jack.
2. Journal.
3. Judge.
4. Justice.

j

¹

/ dʒeɪ /

noun

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

j

²

symbol for

1. maths the unit vector along the y -axis
2. obsolete.
   Also calledi the imaginary number √–1

J

³

symbol for

1. cards jack
2. joule(s)
3. current density

abbreviation for

1. Japan (international car registration)

J

1. Abbreviation of joule