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English definition of “lock (sth) up”

lock (sth) up

verb uk phrasal verb with lock   /lɒk/ us    /lɑːk/
to lock all the doors and windows of a building when you leave it: Sandra, will you lock up tonight when you go?Locking and bolting
(Definition of lock (sth) up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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