n.1.  A general tendency or course of events:
 a warming trend. See Synonyms at 
 tendency.
 2.  Current style; vogue: the latest trend in fashion.
3.  The general direction of something: the river's southern trend.
 intr.v.  trend·ed, 
trend·ing, 
trends 1.  To show a general tendency; tend: The magazine's circulation is trending downward.
2.  To undergo a rapid increase in public interest or attention: News of the earthquake is trending on social media.
3.  To extend, incline, or veer in a specified direction: The prevailing wind trends northeast.