Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
foundation [faunˈdeɪʃən] n (act) основа́ние; (base) осно́ва; (fig) осно́ва, усто́и mpl (organization) о́бщество, фонд (also: foundation cream) крем под макия́ж
foundations
npl (of building) фунда́мент msg
the rumours are without foundation слу́хи не име́ют основа́ний
to lay the foundations (fig) закла́дывать (заложи́ть*perf) осно́вы
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.