Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
indefinitely [ɪnˈdɛfɪnɪtlɪ] adv (continue, wait) бесконе́чно; (be closed, postponed) на неопределённое вре́мя
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.