Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
collection [kəˈlɛkʃən] n (of stamps etc) колле́кция; (of poems etc) сбо́рник; (for charity, also REL) поже́ртвования ntpl (of mail) вы́емка#
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: