Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
default [dɪˈfɔːlt] n (COMPUT) (also: default value) значе́ние по умолча́нию
vi
to default on a debtне выпла́чивать (вы́платить*perf) долг
by default (win) за нея́вкой проти́вника
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.