biblical betrayer of Christ, Latin form of Greek Ioudas, from Hebrew Yehudha (see Judah). He was supposed to have had red hair. As a name for a malicious traitor, it is attested from late 15c. Judas priest as an exclamation in place of "Jesus Christ" is from 1914. Judas tree (1660s) supposedly was the type from which Judas hanged himself. The Judas goat (1941) leads sheep to the shackling pen.

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Definitions of Judas from WordNet
judas (n.)
a one-way peephole in a door;
Judas (n.)
(New Testament) supposed brother of St. James; one of the Apostles who is invoked in prayer when a situation seems hopeless;
Synonyms: Jude / Saint Jude / St. Jude / Thaddaeus
Judas (n.)
(New Testament) the Apostle who betrayed Jesus to his enemies for 30 pieces of silver;
Synonyms: Judas Iscariot
Judas (n.)
someone who betrays under the guise of friendship;