olemus
olukord, kus koormus ületab läbilaskevõime

Wiktionary:
1. the hindrance or blockage of the passage of something, for example a fluid, mixture, traffic, people, etc. (due to an excess of this or due to a partial or complete obstruction), resulting in overfilling or overcrowding

näiteid
https://en.wikipedia.org/wiki/Network_congestion

https://en.wikipedia.org/wiki/Traffic_congestion

https://www.pcwdld.com/network-congestion

https://www.geotab.com/blog/traffic-congestion/

vt ka
- ummistus (1)
- ummistusrünne