This is the 448th most frequent Turkish word.
öncesinde
"Beforehand" or "prior to that."
Used as a preposition to indicate 'before' with respect to time.
Toplantı öncesinde hazırlıklarımızı tamamladık.
We completed our preparations before the meeting.
Functions as a temporal adverb meaning 'beforehand' or 'before doing something in advance.'
Uçağa binmeden önce kontrol listesini öncesinde gözden geçirdim.
Before boarding the plane, I reviewed the checklist beforehand.
Similar to the first example, 'öncesinde' as a time marker prior to an event.