JD is the IATA code for Japan Airlines domestic serviceJD or jd may also stand for:Job DescriptionJuris Doctor, a law degree possessed by some lawyers in certain countriesJudgment DayJohn DoeJewish defense, the concept of the defense of the Jewish People.Julian date, the Julian day number (JDN) plus the decimal fraction of the dayUnited States Department of JusticeJapan Air SystemJordanian Dinar, more accurately abbr