fric ‧ tion /ˈfrɪkʃ ə n/ BrE AmE noun
[ Date: 1500-1600 ; Language: French ; Origin: Latin frictio , from fricare 'to rub' ]
1 . [uncountable and countable] disagreement, angry feelings, or unfriendliness between people SYN tension
cause/create friction
Having my mother living with us causes friction at home.
friction between
the usual frictions between parents and their teenage children
friction with
His independent attitude was a constant source of friction with his boss.
2 . [uncountable] technical the natural force that prevents one surface from sliding easily over another surface:
Putting oil on both surfaces reduces friction.
3 . [uncountable] when one surface rubs against another:
Check your rope frequently, as friction against the rock can wear it away.