Etymology: Latin, through, by means of, by — more at for
Date: 14th century
1: by the means or agency of :through<per bearer> 2: with respect to every member of a specified group : for each 3: according to —often used with as<per instructions><as per usual>
usagePer occurs most frequently in business contexts; its use outside such contexts is often criticized but is quite widespread, especially in sense 2. Its most common and natural nonbusiness uses always involve figures, usually in relation to price <$150 per performance>, automobiles <32 miles per gallon><55 miles per hour>, or sports <averages 15 points and 9 rebounds per game>.
