SENATE is the tr. [Note: translate or translation.] of Gr. gerousia in Act_5:21, where all the senate of the children of Israel is intended to explain the preceding council (synedrion). See Sanhedrin. It is the Jewish senate that is meant likewise in 2Ma_1:10; 2Ma_4:44. The Roman senate is alluded to in 1Ma_8:17 ff.
Hastings' Dictionary of the Bible
Edited by James Hastings, D.D. Published in 1909
(γερουσία, eldership, used by classical writers for a deliberative or legislative body, and by the Sept. for the collective mass of the Jewish elders, and later for the Sanhedrim) is used once in the New Test. (Act_5:21) for some portion of the Sanhedrim, apparently the elders, who constituted its main element. SEE ELDER; SEE SANHEDRIM.
CYCLOPEDIA OF BIBLICAL, THEOLOGICAL AND ECCLESIASTICAL
press 1895.