noun
: a statistical unit denoting one mile traveled by one passenger and used by agencies of public transportation (as railroads, bus lines, or airlines) in measuring the volume of passenger traffic
noun
: a statistical unit denoting one mile traveled by one passenger and used by agencies of public transportation (as railroads, bus lines, or airlines) in measuring the volume of passenger traffic
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012