Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
ordinary [ˈɔːdnrɪ] adj (everyday, usual) обыкнове́нный*обыкнове́нен , обы́чный*обы́чен (mediocre) зауря́дный*зауря́ден
out of the ordinary (exceptional) необыкнове́нный*необыкнове́нен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: