(in the Jewish calendar) the third month of the year according to biblical reckoning and the ninth month of the civil year, usually falling within May and June
Word origin
from Hebrew
Sivan in American English
(siˈvɑn; ˈsɪvən)
noun
the ninth month of the Jewish year
Word origin
Heb siwan, akin to Akkadian simānu, name of 3d Babylonian month