from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Used as a traditional Jewish greeting or farewell.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. A greeting said on meeting someone, especially when the two people meeting have not met in some time.
Hebrew šālôm 'ălêkem, peace be with you : šālôm, peace; see šlm in Semitic roots + 'ălêkem, with you ('al, 'ălê, to, upon; see ʿly in Semitic roots + -kem, second person pl. pronoun).(American Heritage® Dictionary of the English Language, Fourth Edition)
From Hebrew שָׁלוֹם עֲלֵיכֶם (shalóm alechém, "shalom aleichem") (Wiktionary)