Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
circumscribe [ˈsəːkəmskraɪb] vt (GEOM) впи́сывать (вписа́ть*perf) в окру́жность (fig) ограни́чивать (ограни́чить perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.