cordon
( cordons plural & 3rd person present) ( cordoning present participle) ( cordoned past tense & past participle ) A cordon is a line or ring of police, soldiers, or vehicles preventing people from entering or leaving an area. n-count
Police formed a cordon between the two crowds. cordon off phrasal verb If police or soldiers cordon off an area, they prevent people from entering or leaving it, usually by forming a line or ring.
(=close off)
Police cordoned off part of the city centre... V P n (not pron)
The police cordoned everything off. V n P
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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"