overlapping; piling up; stacking
Refers to things being placed one on top of another, or events occurring at the same time. Often used for physical layers, schedules, or abstract coincidences.
I organize the stack of documents.
I cannot attend due to overlapping schedules.
Worn out by one bad thing piling up after another, he was completely exhausted.
It was just a series of coincidences.
A scheduling conflict came up.
We adjusted things to avoid overlapping meeting times.