Strong's Definition
probably of Persian origin; Sivan, the third Heb. month
KJV Usage: Sivan
STEPBible — Tyndale Abridged Hebrew Lexicon
סִיוָן (si.van) — Sivan.
§ Sivan = "their covering" the 3rd month in the Jewish calendar corresponding to May-Jun
UBS Dictionary of Biblical Hebrew
name
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
סִיוָן n.pr. of 3rd month, Sîwān = May-June;—Est 8:9. ref