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.
Informal. each; for each one: The charge for window-washing was five dollars per.
- per , purr (see usage note at the current entry)
Other definitions for per- (2 of 4)
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).
Other definitions for per. (3 of 4)
Other definitions for Per. (4 of 4)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use per in a sentence
Added to drinking water at concentrations of around one part per million, fluoride ions stick to dental plaque.
During an emergency that ratio could be allowed to drop to 8.5 people per orbit.Exclusive: U.S. Drone Fleet at ‘Breaking Point,’ Air Force Says | Dave Majumdar | January 5, 2015 | THE DAILY BEAST
Well over a thousand holes in, I average less than four strokes per hole.Lost For Thousands of Strokes: 'Desert Golfing' Is 'Angry Birds' as Modern Art | Alec Kubas-Meyer | January 2, 2015 | THE DAILY BEAST
At least one child in CAR has been killed or gravely injured per day, and 10,000 have been recruited into militant groups.
Bitcoin began 2013 with a roaring price of $770 per unit, and businesses right and left were converting to the ethereal product.You Were Wrong About Miley & Bitcoin: 2014’s Failed Predictions | Nina Strochlic | December 31, 2014 | THE DAILY BEAST
I doubt that thirty persons per day are carried into or brought out of it by all public conveyances whatever.Glances at Europe | Horace Greeley
The Act permits member banks to accept an amount of bills not exceeding 50 per cent.Readings in Money and Banking | Chester Arthur Phillips
At this period it brought enormous prices, the finest selling at from fifteen to eighteen shillings per pound.Tobacco; Its History, Varieties, Culture, Manufacture and Commerce | E. R. Billings.
In 1205 wheat was worth 12 pence per bushel, which was cheap, as there had been some years of famine previous thereto.Showell's Dictionary of Birmingham | Thomas T. Harman and Walter Showell
We did not talk much about the past at dinner, except—ah me, how bitterly we regretted our 10 per cent.Gallipoli Diary, Volume I | Ian Hamilton
British Dictionary definitions for per (1 of 3)
for every: three pence per pound
(esp in some Latin phrases) by; through
as per according to: as per specifications
as per usual informal as usual
British Dictionary definitions for PER (2 of 3)
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British Dictionary definitions for per- (3 of 3)
away, beyond: perfidy
completely, throughly: perplex
indicating that a chemical compound contains a high proportion of a specified element: peroxide; perchloride
indicating that a chemical element is in a higher than usual state of oxidation: permanganate; perchlorate
(not in technical usage) a variant of peroxy- persulphuric acid
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