Overfullness is a term that describes a state of being excessively full. When a container or space is overfull, it is so crowded with things that it cannot accommodate anything else. Certain synonyms for overfullness include congestion, crowding, excess, overflow, saturation, and surplus. These words can be used to describe various situations such as a crowded event, an overflowing trash can, or a person's busy schedule. Overfullness can also be used in a metaphorical sense to describe emotions or thoughts that are overwhelming or too intense. It is important to be aware of overfullness in one's surroundings and take steps to reduce it to ensure safety and comfort.