- Per mean for each once.
An example of per used as an adverb is in the phrase, "one cookie per person," which means one cookie for each person.
- Per is defined as to, for, by or according to.
An example of per used as a preposition is in the phrase, "as per standards," which means by the standards.
- through; by; by means of
- for each; for every: fifty cents per yard
- during each: used in indicating a rate of motion or activity: to cover 500 miles per day
- according to: used esp. in business: per your instructions
Origin of perClassical Latin ; from Indo-European base an unverified form per-, a going beyond from source far, for
- through, throughout: perfoliate, peroral
- thoroughly, completely, very: perfervid
- containing a specified element or radical in its maximum, or a relatively high, valence: perchloric acid
- containing the maximum amount of the indicated element: perfluoropropane (completely fluorinated propane, CF)
- containing the divalent group O: peracidsometimes peroxy-
Origin of per-Classical Latin ; from per, through: see per
- To, for, or by each; for every: Gasoline once cost 40 cents per gallon.
- According to; by: Changes were made to the manuscript per the author's instructions.
- By means of; through.
- For each one; apiece: sold the cookies for one dollar per.
- Per hour: was driving at 60 miles per.
Origin of perLatin; see per1 in Indo-European roots.
- Thoroughly; completely; intensely: perfervid.
- 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.
Origin of per-Latin, from per, through; see per1 in Indo-European roots.
- for each
- Admission is £10 per person.
- to each, in each (used in expressing ratios of units)
- miles per gallon
- beats per minute
- (medicine) via (the), by (the), through (the) (followed by Latin name for an orifice)
- Introduce the endoscope per nasum.
- The medication is to be administered per os.
- in accordance with
- I parked my car at the curb per your request.
- The preposition per is typically followed by a singular noun phrase with no determiner.
- Take one pill per day. not Take one pill per a day.
- It is sometimes followed by plural noun phrases, almost always determined by 100, 1,000, 100,000, etc.
- The abortion rate in the U.S. has dropped since 1980 from nearly 30 per 1,000 women of childbearing age to less than 20.
- per- (as in perfect, perfection and perplex)
(third-person singular, gender-neutral, reflexive perself)
shortening of person, coined by Marge Piercy in Woman on the Edge of Time (1979)