n]
| 1. | surface resistance to relative motion, as of a body sliding or rolling. |
| 2. | the rubbing of the surface of one body against that of another. |
| 3. | dissension or conflict between persons, nations, etc., because of differing ideas, wishes, etc. |

The resistance of an object to the medium through which or on which it is traveling, such as air, water, or a solid floor.
friction fric·tion (frĭk'shən)
n.
The rubbing of one object or surface against another.
A physical force that resists the relative motion or tendency to such motion of two bodies in contact.