synagogue (n.)
late 12c., "the regular public worship of the Jews," also the building in which this is done, from Old French sinagoge "synagogue, mosque, pagan temple" (11c., Modern French synagogue), from Late Latin synagoga "congregation of Jews," from Greek synagoge "place of assembly, synagogue; meeting, assembly," literally "a bringing together," from synagein "to gather, bring together, assemble," from syn- "together" (see syn-) + agein "bring, lead" (see act (v.)).

Used by Greek translators of the Old Testament as a loan-translation of late Hebrew keneseth "assembly" (as in beth keneseth "synagogue," literally "house of assembly;" compare Knesset). Related: Synagogical; synagogal.