Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
overlap [əuvəˈlæp] vi (edges) находи́ть*(impf) оди́н на друго́й (fig, ideas, activities etc) части́чно совпада́ть (совпа́сть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.