grip, traction, adhesive friction (noun)
the friction between a body and the surface on which it moves (as between an automobile tire and the road)
(orthopedics) the act of pulling on a bone or limb (as in a fracture) to relieve pressure or align parts in a special way during healing
"his leg was in traction for several days"
the act of pulling something along a surface using motive power
the condition of being so pulled
the pulling power of an engine or animal
the adhesive friction of a wheel etc on a surface
a mechanically applied sustained pull, especially to a limb
the extent of adoption of a new product or service, typically measured in number of customers or level of revenue achieved
Traction refers to the maximum frictional force that can be produced between surfaces without slipping. The units of traction are those of force, or if expressed as a coefficient of traction a ratio.