C1 在…之前
before a particular time or event
the weeks prior to her death 她死之前的几个星期
I was trying to finish up my work prior to the trip.
He has to send his film scripts for government approval prior to shooting.
He lived in Boston prior to his arrest.
You should talk to a doctor prior to undertaking any strenuous exercise regime.
See also: prior adjective (EARLIER)