1.
state of saturation; saturation point; being at capacity
A state where no more can be absorbed, added, or accommodated. Used both in scientific contexts (chemistry, physics) and figuratively for markets, schedules, and capacities that are at their limit.
Usage
The figurative use in business and everyday contexts is more common than the scientific meaning. Often used to describe markets, industries, or situations where growth or expansion has reached its natural limit.