Main definitions of j in English

• (in electrical engineering and electronics) the imaginary quantity equal to the square root of minus one.

nounJs, J's

• 1The tenth letter of the alphabet.

  1. 1.1Denoting the next after I (or H if I is omitted) in a set of items, categories, etc.

• 2"J"A shape like that of a capital J (without a crosspiece).

• 3archaic Used instead of I as the Roman numeral for one in final position.

  ‘between ij and iij of the clock’

abbreviation

• 1Jack (used in describing play in card games).

• 2Japan (international vehicle registration).

• 3Physics
  Joule(s).

• 4(in titles) Journal (of)

  ‘J. Biol. Chem’