Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
listen [ˈlɪsn] vi
to listen (to sb/sth) слу́шать (impf) (кого́-н/что-н)
to listen to sb or sb's advice слу́шать (послу́шать perf) кого́-н
I'm listening out for him я прислу́шиваюсь, не идёт ли он
listen! послу́шайте!
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.