back up | ˌback sth ↔ ˈup
to move backwards, especially in a vehicle :
You can back up another two feet or so.
I backed the car up to the door.
back up | ˌback sth ↔ ˈup
to move backwards, especially in a vehicle :
You can back up another two feet or so.
I backed the car up to the door.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005