Taken from Miriamwebster.com
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What is Jewish:
Main Entry: Jew·ish
Pronunciation: 'jü-ish
Function: adjective
: of, relating to, or characteristic of the Jews; also : being a Jew
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What is a Jew?
Main Entry: Jew
Pronunciation: 'jü
Function: noun
Etymology: Middle English, from Old French gyu, 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 6th century B.C. to the 1st 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
* Read Carefully! "ISRAELITE / Palestine" These are key words representing a Country of Origin.
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What is Judaism?
Main Entry: Ju·da·ism
Pronunciation: 'jü-d&-"i-z&m, 'jü-dE-, 'jü-(")dA-, British also 'jü-"di-z&m
Function: noun
1 : a religion developed among the ancient Hebrews and characterized by belief in one transcendent God who has revealed himself to Abraham, Moses, and the Hebrew prophets and by a religious life in accordance with Scriptures and rabbinic traditions
2 : conformity to Jewish rites, ceremonies, and practices
3 : the cultural, social, and religious beliefs and practices of the Jews
4 : the whole body of Jews : the Jewish people
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Taken from the Cambridge Dictionary:
http://dictionary.cambridge.org/
What is a Jew or Jewish?
Jew
noun [C]
a person whose religion is Judaism, or a person related by birth to the ancient peoples of Israel
Jewish
adjective [not gradable]
of or related to Jews
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What is Judaism?
Judaism
noun
a religion based on a belief in a single God and on the Talmud (= a collection of writings explaining Jewish law and customs) and parts of the Bible
The related adjective is Jewish, see at JEW
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If considering "Jewish" as a race, linking this defination to Tribal interactions the descriptions meet (2) and (3) from Miriamwebster.com :
Main Entry: race
Function: noun
Etymology: Middle French, generation, from Old Italian razza
1 : a breeding stock of animals
2 a : a family, tribe, people, or nation belonging to the same stock b : a class or kind of people unified by community of interests, habits, or characteristics <the English race>
3 a : an actually or potentially interbreeding group within a species; also : a taxonomic category (as a subspecies) representing such a group b : BREED c : a division of mankind possessing traits that are transmissible by descent and sufficient to characterize it as a distinct human type