Per

preposition

1. For each.

   "$2.50 per dozen"

2. To each, in each (used in expressing ratios of units).

   "100 centimeters per meter"

3. By the, by means of the, via the, through the.

   "Introduce the endoscope per nasum."

4. In accordance with.

   "I parked my car at the curb per your request."