<p><strong>Noun</strong></p><ul><li>Physics: surface resistance to relative motion, as of a body sliding or rolling.</li><li>the rubbing of the surface of one body against that of another: Rubber on pavement has more friction than steel wheel on steel rail.</li><li>dissension or conflict between people, nations, etc., because of differing ideas, wishes, etc.: Friction between family members can escalate during a heat wave, as extreme weather can cause tempers to fray.</li><li>Synonyms: contention, antagonism, clash, dissidence, discord.</li></ul>