[tí qián]
（往前移） shift to an earlier date; move up (a date); bring forward; advance
The time for the strike has been moved up.
罢工的时间提前了。
（事先） in advance; ahead of time; ahead of schedule; beforehand
release [discharge] before the sentence expires
提前释放
fulfil the plan a month ahead of time
提前一个月完成计划
convene the congress before the due date
提前召开大会
fulfil [finish] the task ahead of schedule [time]
提前完成任务
If there is any change about the time of the meeting, please notify us in advance.
开会时间如有变， 请提前告诉我们。