Judas

(noun) (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.

(noun) (New Testament) the Apostle who betrayed Jesus to his enemies for 30 pieces of silver. Synonyms: Judas Iscariot.

(noun) someone who betrays under the guise of friendship.

(noun) a one-way peephole in a door. Synonyms: judas.

(noun) an ancient kingdom of southern Palestine with Jerusalem as its center. Synonyms: Judah, Juda.