We found 3 dictionaries that define the word per day:

General (2 matching dictionaries)

1. per day: Collins English Dictionary
2. per-day: Wordnik

Business (1 matching dictionary)

3. per day: Legal dictionary

Phrases: barrels per day, barrels per stream day, Million standard cubic feet per day, more... ▸ Words similar to per day ▸ Usage examples for per day ▸ Idioms related to per day ▸ Wikipedia articles (New!) ▸ Words that often appear near per day ▸ Rhymes of per day ▸ Invented words related to per day