|Origin:||Latin frictio, from fricare 'to rub'|
1 [uncountable and countable]
disagreement, angry feelings, or unfriendliness between people [= tension]
Having my mother living with us causes friction at home.
the usual frictions between parents and their teenage children
2HP [uncountable] technical
the natural force that prevents one surface from sliding easily over another surface:
Putting oil on both surfaces reduces friction.
when one surface rubs against another:
Check your rope frequently, as friction against the rock can wear it away.