A force that resists the relative motion or tendency to such motion of two bodies in contact.
The rubbing of one object or surface against another.
(Second Sino-Japanese War) Conflict, as between the Communists and non-Hanjian Kuomintang forces.
Conflict, as between persons having dissimilar ideas or interests; clash.
The difference in electrostatic potential between two points in space, especially between live and neutral conductors or the earth.