Questions & Answers about Перед совещанием я разложил документы на столе.
Because the preposition перед normally takes the instrumental case when it means before or in front of.
- совещание = nominative
- совещанием = instrumental
So:
- перед совещанием = before the meeting
This is true for both time and space:
- перед домом = in front of the house
- перед совещанием = before the meeting
Both can mean before the meeting, but they are not always identical.
- перед совещанием often means right before or in the period just before
- до совещания is a more general before / prior to / by the time of
In this sentence, перед совещанием sounds very natural if the speaker is describing something done shortly before the meeting started.