Meaning of ROLLING in English

ROLLING

roll ‧ ing /ˈrəʊlɪŋ $ ˈroʊ-/ BrE AmE adjective [only before noun]

[ Word Family: verb : ↑ roll , ↑ unroll ; noun : ↑ roll , ↑ roller ; adjective : ↑ rolling ]

1 . rolling hills have many long gentle slopes

2 . done or happening regularly over a period of time, not all at once:

We recommend a rolling programme of machine upgrading.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.