Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
lightly [ˈlaɪtlɪ] adv (touch, kiss) слегка́; (eat, treat) легко́; (sleep) неглубоко́
to get off lightly легко́ отде́лываться (отде́латься perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.