Overrepresentation refers to a situation in which a particular group or category appears more frequently than expected in a given context, relative to its proportion in the general population or baseline.

Examples: In statistics: If 10% of a population belongs to Group A, but Group A makes up 30% of a study sample, Group A is overrepresented.

In genetics: A gene may be overrepresented in a pathway if it appears more often than would be expected by chance.

In sociology: Certain ethnic groups might be overrepresented in prison populations relative to their percentage of the overall population.

It's often used in analytical, demographic, and scientific contexts to highlight potential bias, enrichment, or disproportionality.