From Longman Dictionary of Contemporary Englishpre-pre- /priː/ prefix 1 BEFOREbefore someone or something → ante- pre-war (=before a war)2 in preparation a prearranged signal Preset the video.
Examples from the Corpus
pre-• a prenatal test• a prewar movie• prerecorded music• As usual, the government seems to have forgotten most of its pre-election promises.• pre-Franco Spain• pre-holiday shopping• You have to pre-register by January 24.• Life in pre-war Britain was simpler and less fast-paced.From Longman Business Dictionarypre-pre- /priː/ prefix coming before somethingPre-tax profits (=profits before tax has been taken off) were up 7.5%.the difference between the pre- and post-crash resultsOrigin pre- Old French Latin prae-, from prae “in front of, before” 