Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
depression [dɪˈprɛʃən] n (PSYCH, ECON) депре́ссия; (METEOROLOGY) о́бласть f ни́зкого давле́ния (hollow) углубле́ние; (:in landscape) впа́дина
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.