Real Dictionary

P.R.E. in American English
abbreviation: Petroleum Refining Engineer

pre-
prefix: Pre- is used to form words that indicate that something takes place before a particular date, period, or event.

pre- in American English
prefix: a prefix occurring originally in loanwords from Latin, where it meant “before” ( preclude; prevent); applied freely as a prefix, with the meanings “prior to,” “in advance of,” “early,” “ beforehand,” “before,” “in front of,” and with other figurative mean

pre- in British English
before in time, earlier (than), prior (to)
prefix: before in time, rank, order, position, etc