J1 or j [ jey ] 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. More @Wikipedia
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