Definition of "pro-" []

• Acting in the place of; substituting for: proform. (prefix)
• Supporting; favoring: prorevolutionary. (prefix)
• Earlier; before; prior to: procambium. (prefix)
• Rudimentary: pronucleus. (prefix)
• Anterior; in front of: procephalic. (prefix)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Look for the words "trigger warning," thinspo code indicating that you've reached a pro-anorexia blog aka pro-"ana" in thinspo speak."
• "It's almost funny how these people would exchange the person who is, looking at it from their "pro- occupation at all costs" vantage point the most "pro-Israel" president ever for an unknown quantity like Perry or Romney."
• "On Feb. 10, deadly gunbattles between these pro- and anti-Assad factions prompted the Lebanese army to intervene."