J

J¹

(also j)

noun (plural Js or J's)

1》 the tenth letter of the alphabet.

2》 denoting the next after I in a set of items, categories, etc.

3》 archaic (as a Roman numeral) used instead of an I when in a final position.

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J²

abbreviation

1》 jack.

2》 Japan (international vehicle registration).

3》 Physics joule(s).

4》 (in titles) Journal (of).