Word: 事先 (shìxiān) 事先 dictionary entry shìxiān in advance; before the event; beforehand; prior Full dictionary entry for 事先 Example sentences using 事先 2 sentences, showing page 1 of 1. 你必须事先预约。 Nǐ bìxū shìxiān yùyuē. You have to make a reservation. 请你事先把计划告诉我。 Qǐng nǐ shìxiān bǎ jìhuà gàosu wǒ. Please let me know the schedule beforehand.