What is the meaning of J?

The tenth letter of the basic modern Latin alphabet.

a palatal approximant a.k.a. yod.

palatalization ([j]-coloring) of a consonant; or a weak, fleeting or epenthetic [j].

one.

imaginary unit

The tenth letter of the English alphabet, called jay and written in the Latin script.

A term for a marijuana cigarette ('joint').

An alternative version of i, the positive square root of -1; used in the context of electronics.

The second unit vector, after i

a suffix or final syllable /ʃən/ (-tion, -sion, etc.)

A letter of the Araki alphabet.

A letter of the Mazahua alphabet.

A letter of the Chipewyan alphabet, written in the Latin script.

O! (vocative interjection)

to say

statement, report, word (about someone’s good qualities)

some part of a reed, likely panicles or leaves

The tenth letter of the Kankanaey alphabet, called dyey and written in the Latin script.

The tenth letter of the Karelian alphabet, called jii and written in the Latin script.

The fifteenth letter of the Livonian alphabet, written in the Latin script.

A letter of the Mam alphabet.

Alternative form of I (“I”)

Antepenultimate letter of the Norwegian alphabet, coming after i and before k.

The twelfth letter of the Nupe alphabet, written in the Latin script.

The seventeenth letter of the Skolt Sami alphabet, written in the Latin script.

A letter of the Tlingit alphabet, written in the Latin script.

A letter of the Yele alphabet. Only occurs in the digraph ⟨nj⟩.

The fifteenth letter of the Azerbaijani alphabet, written in the Latin script.

The tenth letter of the Basque alphabet, called jota and written in the Latin script.

the tenth letter of the Dutch alphabet

The thirteenth letter of the Esperanto alphabet, called jo and written in the Latin script.

The tenth letter of the Estonian alphabet, called jott and written in the Latin script.

The twelfth letter of the Faroese alphabet, called jodd and written in the Latin script.

The tenth letter of the Finnish alphabet, called jii and written in the Latin script.

The tenth letter of the French alphabet, written in the Latin script.

A letter of the Fula alphabet, written in the Latin script.

Romanization of 𐌾

The seventeenth letter of the Hungarian alphabet, called jé and written in the Latin script.

The thirteenth letter of the Icelandic alphabet, written in the Latin script.

The tenth letter of the Ido alphabet, written in the Latin script.

The tenth letter of the Indonesian alphabet, written in the Latin script.

the tenth letter of the Latin alphabet, called i lunga in Italian

The fourteenth letter of the Kashubian alphabet, written in the Latin script.

The fifteenth letter of the Latvian alphabet, called jē and written in the Latin script.

The tenth letter of the Malay alphabet, written in the Latin script.

A letter of the Navajo alphabet, written in the Latin script.

The thirteenth letter of the Polish alphabet, called jot and written in the Latin script.

The tenth letter of the Portuguese alphabet, written in the Latin script.

The thirteenth letter of the Romani alphabet, written in the Latin script.

The fourteenth letter of the Romani alphabet, written in the Latin script.

The thirteenth letter of the Romanian alphabet, called je or jî and written in the Latin script.

The fourteenth letter of the Serbo-Croatian alphabet, written in the Latin script.

The twelfth letter of the Silesian alphabet, written in the Latin script.

The tenth letter of the Spanish alphabet, written in the Latin script.

The tenth letter of the Swedish alphabet, called ji and written in the Latin script.

The tenth letter of the Tagalog alphabet (the Filipino alphabet), called dyey and written in the Latin script.

The eleventh letter of the Tagalog alphabet (the Abecedario), called jota and written in the Latin script.

The thirteenth letter of the Turkish alphabet, called je and written in the Latin script.

The eleventh letter of the Turkmen alphabet, called je and written in the Latin script.

The ninth letter of the Uzbek alphabet, called je and written in the Latin script.

The fourteenth letter of the Welsh alphabet, called èl and written in the Latin script. It is preceded by i and followed by l.

The eleventh letter of the Yoruba alphabet, called jí and written in the Latin script.

The tenth letter of the Zulu alphabet, written in the Latin script.

Source: wiktionary.org