If you seal something up , you close it completely so that nothing can get in or out.
The paper was used for sealing up holes in walls and roofs.
PHRASAL VERB : V P n (not pron) , also V n P
If you seal something up , you close it completely so that nothing can get in or out.
The paper was used for sealing up holes in walls and roofs.
PHRASAL VERB : V P n (not pron) , also V n P
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006