To close something off means to separate it from other things or people so that they cannot go there.
Police closed off about 12 blocks of a major San Francisco thoroughfare for today’s march...
= seal off
PHRASAL VERB : V P n (not pron)
To close something off means to separate it from other things or people so that they cannot go there.
Police closed off about 12 blocks of a major San Francisco thoroughfare for today’s march...
= seal off
PHRASAL VERB : V P n (not pron)
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006