Frictional refers to the resistance that occurs when two surfaces rub against each other. This force can slow down or stop the motion of objects, making it an important factor in everyday activities, such as walking or driving. The amount of frictional force depends on the materials involved and how rough or smooth their surfaces are. In economics, "frictional" can describe a type of unemployment that occurs when people are temporarily out of work while transitioning between jobs. This is a normal part of the job market, as individuals seek positions that better match their skills or preferences. Frictional unemployment is usually short-term and can be influenced by factors like job availability and worker mobility.