Lock up: (1) To secure metal type in a forme ready for printing or moulding. (2) In program execution,a state from which the system cannot escape.

• (1)锁版，(2)卡住:(1)紧固铅字版于铁框内，以便印刷或压模的情况。(2)在执行电脑指令时，系统僵化，不能退出的情况。