lock up phr v 1 [I,T lock sth ↔ up] to make a building safe by locking all the doors 锁好〔建筑物的〕门〔以保安全〕: Would you mind locking up when you leave? 你走的时候请把门都锁上，好吗？ 2 also 又作 lock away [T lock sb ↔ up/away] to put someone in prison or in a hospital for people who are mentally ill 把〔某人〕关入监狱; 把〔某人〕关进精神病院: Higgs was locked up for three years for his part in the robbery. 希格斯因参与抢劫坐了三年牢。