per S3 W1 / pə ; strong pɜ $ pər strong pɜr / 介词

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