[1] : The Collaborative International Dictionary of English v.0.48

sanhedrin \san"hedrin\, sanhedrim \san"hedrim\, n. heb.
   sanhedrimacn, fr. gr. ?; ? with + ? a seat, fr. ? to sit.
   see sit. jewish antiq.
   the great council of the jews, which consisted of seventy
   members, to whom the high priest was added. it had
   jurisdiction of religious matters.
   1913 webster
see also:
sit 

[2] : The Collaborative International Dictionary of English v.0.48

synagogue \syn"agogue\, n. f., from l. synagoga, gr. ? a
   bringing together, an assembly, a synagogue, fr. ? to bring
   together; sy`n with + ? to lead. see syn-, and agent.
   1. a congregation or assembly of jews met for the purpose of
      worship, or the performance of religious rites.
      1913 webster

   2. the building or place appropriated to the religious
      worship of the jews.
      1913 webster

   3. the council of, probably, 120 members among the jews,
      first appointed after the return from the babylonish
      captivity; -- called also the great synagogue, and
      sometimes, though erroneously, the sanhedrin.
      1913 webster

   4. a congregation in the early christian church.
      1913 webster

            my brethren, . . . if there come into your synagogue
            a man with a gold ring.               --james ii.
                                                  1,2 rev.
                                                  ver..
      1913 webster

   5. any assembly of men. obs. or r. --milton.
      1913 webster
see also:
syn- agent great synagogue sanhedrin 

[3] : Hitchcock's Bible Names Dictionary (late 1800's)

sanhedrin, sitting together

Sanhedrin >> S Words
Sanhedrin, definition of term: Sanhedrin
sanhedrin_pag1.html