j

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The tenth letter of the modern English alphabet.
• noun Any of the speech sounds represented by the letter j.
• noun The tenth in a series.
• noun Something shaped like the letter J.
• noun The hypothetical source of those portions of the Pentateuch in which God is referred to with the Tetragrammaton rather than as Elohim.

from The Century Dictionary.

• An abbreviation
• of the Latin judex, judge;
• of Jupiter;
• of Justice.

from the GNU version of the Collaborative International Dictionary of English.

• J is the tenth letter of the English alphabet. It is a later variant form of the Roman letter I, used to express a consonantal sound, that is, originally, the sound of English y in yet. The forms J and I have, until a recent time, been classed together, and they have been used interchangeably.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The tenth letter of the basic modern Latin alphabet.
• noun palatal approximant
• noun pharmacy, obsolete one
• noun The tenth letter of the English alphabet, called jay and written in the Latin script.
• noun slang A term for a marijuana cigarette ('joint').
• noun mathematics An alternative version of i, the positive square root of -1; used in the context of electronics.
• noun mathematics The second unit vector, after i

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the 10th letter of the Roman alphabet
• noun a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second