per

[ pur; unstressed per ]
/ pɜr; unstressed pər /

preposition

for each; for every: Membership costs ten dollars per year. This cloth is two dollars per yard.
by means of; by; through: I am sending the recipe per messenger.
according to; in accordance with: I delivered the box per your instructions.

adverb

Informal. each; for each one: The charge for window-washing was five dollars per.

Origin of per

1580–90; < Latin: through, by, for, for each. See for

Can be confused

per purr (see usage note at the current entry)

Usage note

Per for a or an or for each occurs chiefly in technical or statistical contexts: miles per gallon; work-hours per week; feet per second; gallons of beer per person per year. It is also common in sports commentary: He averaged 16 points per quarter. Per is sometimes criticized in business writing in the sense “according to” and is rare in literary writing.

Definition for per (2 of 4)

per-


a prefix meaning “through,” “thoroughly,” “utterly,” “very”: pervert; pervade; perfect.
Chemistry. a prefix used in the names of inorganic acids and their salts that possess the maximum amount of the element specified in the base word: percarbonic (H2C2O5), permanganic (HMnO4), persulfuric (H2S2O8), acids; potassium permanganate (KMnO4); potassium persulfate (K2S2O8).

Origin of per-

< Latin, combining form of per per, and used as an intensive

Definition for per (3 of 4)

Definition for per (4 of 4)

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for per

British Dictionary definitions for per (1 of 3)

per

/ (pɜː, unstressed ) /

determiner

for everythree pence per pound

preposition

(esp in some Latin phrases) by; through
as per according toas per specifications
as per usual informal as usual

Word Origin for per

C15: from Latin: by, for each

British Dictionary definitions for per (2 of 3)

PER


abbreviation for (in Britain)

Professional Employment Register

British Dictionary definitions for per (3 of 3)

per-


prefix

Word Origin for per-

from Latin per through
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for per

per-


pref.

Thoroughly; completely; intensely:perfuse.
Containing an element in its highest oxidation state:perchloric acid.
Containing a large or the largest possible proportion of an element:peroxide.
Containing the peroxy group:peracid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.