per
preposition
[ pəː ]
• for each (used with units to express a rate).
• "he charges £2 per square yard"
• by means of.
• "send it per express"
• divided by a line in the direction of.
• "per saltire"
Origin:
Latin, ‘through, by means of’; partly via Old French.
per-
prefix
• through; all over.
• "perforation"
• having the maximum proportion of some element in combination.
• "peroxide"
Origin:
from Latin (see per).
as per
• in accordance with.
• "made as per instructions"