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. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012