Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
daydream [ˈdeɪdriːm] vi предава́ться*(impf) мечта́ниям, гре́зить*(impf)
n мечта́ние, грёза
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: