Definitions from Wiktionary, a free dictionary

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Contents 1 English 1.1 Pronunciation 1.2 Noun 2 Romanian 2.1 Pronunciation 2.2 Letter

English

Pronunciation

•  Audio (US)^{help, file}

Noun

J

1. The tenth letter of the English alphabet.
2. (slang) A term for a marijuana cigarette ('joint').

   "I went outside to smoke myself a J" — Paul Simon, from the song "Late in the Evening" from the album, "One Trick Pony."

3. (mathematics) An alternative version of i, the positive square root of -1; used in the context of electronics.
4. (mathematics) The second unit vector, after i

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Romanian

Pronunciation

IPA: /ʒe/

Letter

j (lowercase, capital J)

1. The tenth letter of the Romanian alphabet representing thee phoneme /ʒ/. Preceded by î and followed by k.