per
[preposition]
Synonyms: via, by, by dint of, by means of, by virtue of, by way of, through, with
[adverb]
Synonyms: apiece, all, aside, each, per capita, per caput

[TahlilGaran] English Synonym Dictionary ▲

per S3 W1 /pə; strong pɜː $ pər strong pɜːr/ preposition
[Date: 1300-1400; Language: Latin; Origin: 'through, by']

1. per hour/day/week etc during each hour etc:
The park attracts four million visitors per year.
miles/kilometres per hour (=used for measuring speed)
a speed limit of 40 miles per hour

2. for each:
How much does it cost per kilo?
rooms costing £40 per night
Admission is £9.95 per adult.
My car does 12 miles per litre (=for each litre of petrol).
The meal cost $25 per head (=for or by each person).

3. as per something formal according to something:
The work was carried out as per your instructions.

4. as per usual/normal spoken used when something annoying happens which has often happened before:
Jenny was late, as per usual.
⇒ per annum, per capita

[TahlilGaran] Dictionary of Contemporary English ▲