Lexical Definition

‎γερουσία‎ gerousía (gher-oo-see'-ah) council of elders G:N-F
from ‎γέρων‎

senate.

Usage: 3 forms in 27 verses
Form Translated As     In Verse(s)
γερουσίασ council of elders LXX.Deut.22.17LXX.Deut.25.9
γερουσίαν Senate Acts.5.21
council of elders LXX.Exod.3.16LXX.Exod.4.29LXX.Exod.12.21LXX.Lev.9.1LXX.Deut.21.19LXX.Deut.22.15LXX.Deut.25.7
their council of elders LXX.Josh.23.2
γερουσία council of elders LXX.Exod.3.18LXX.Lev.9.3LXX.Num.22.4LXX.Num.22.7LXX.Num.22.7LXX.Deut.19.12LXX.Deut.21.3LXX.Deut.21.4LXX.Deut.21.6LXX.Deut.22.16LXX.Deut.22.18LXX.Deut.25.8LXX.Deut.27.1
your council of elders LXX.Deut.5.23LXX.Deut.21.2LXX.Deut.29.10

Abbott-Smith

γερουσία, -ας, ἡ (< γέρων), [in LXX (Hex. only in OT) for זָקֵן;]
a council of elders, senate; in NT, of the Sanhedrin (Cl. Rev., i, 43 f.; DB, ext., 99): Ac 5:21.†

Abbott-Smith References

Book Refs
Acts 5:21

Liddell-Scott-Jones

γερουσία-α, ,

Council of Elders, senate, [Refs 5th c.BC+]; compare γερωΐα and γεροντί; also of the Carthaginian [Refs 4th c.BC+]; and the Roman, [Refs 1st c.AD+]; of the Jewish Sanhedrin, [LXX+NT]

__2 sacred college, ἱερὰ γ. [Refs 3rd c.BC+]
__II ={πρεσβεία}, [Refs 5th c.BC+]

LSJ Scripture Refs: Acts.5.21LXX.Exod.3.16