j

1a :  the 10th letter of the English alphabetb :  a speech counterpart of orthographic j (as j in jump)

2a :  a graphic device for reproducing the letter jb :  a unit vector parallel to the y-axis

3 :  one designated j especially as the 10th in order or class

4 :  something shaped like the letter J

5J plural J's or Js basketball, informal :  jump shot … she flicked a pass to the corner, where Lawson nailed a J to tie the game at 51. — Hank Hersch