http://dictionary.reference.com/browse/jew
Jew Pronunciation[joo]
–noun 1. one of a scattered group of people that traces its descent from the Biblical Hebrews or from postexilic adherents of Judaism; Israelite.
2. a person whose religion is Judaism.

http://www.m-w.com/dictionary/jew
Main Entry: Jew
Pronunciation: 'jü
Function: noun
Etymology: Middle English, from Anglo-French ju, jeu, from Latin Judaeus, from Greek Ioudaios, from Hebrew YehudhI, from YehudhAh Judah, Jewish kingdom
1 a : a member of the tribe of Judah b : ISRAELITE
2 : a member of a nation existing in Palestine from the sixth century B.C. to the first century A.D.
3 : a person belonging to a continuation through descent or conversion of the ancient Jewish people
4 : one whose religion is Judaism

http://dictionary.cambridge.org/define.asp?key=42634...
Jew Show phonetics
noun [C]
a member of a race of people whose traditional religion is Judaism:
Although my family is Jewish, we're not practising Jews (= actively involved in the religion).