prefix.
1 favouring or supporting (pro-government).
2 acting as a substitute or deputy for (proconsul).
3 forwards (produce).
4 forwards and downwards (prostrate).
5 onwards (proceed; progress).
6 in front of (protect).
Etymology: L pro in front (of), for, on behalf of, instead of, on account of
2.
prefix before in time, place, order, etc. (problem; proboscis; prophet).
Etymology: Gk pro before
Useful english dictionary. 2012.