lock up | ˌlock sth ↔ ˈup
to make a building safe by locking the doors and windows :
Don't forget to lock up at night.
He locked up the shop and went home.
lock up | ˌlock sth ↔ ˈup
to make a building safe by locking the doors and windows :
Don't forget to lock up at night.
He locked up the shop and went home.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005