| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
| |
| pro1 |
| |
| PREFIX: | 1. Acting in the place of; substituting for: proform. 2. Supporting; favoring: prorevolutionary. | | ETYMOLOGY: | Middle English, from Old French, from Latin pro-, pr -, from pr , for. See per1 in Appendix I.
| | |
| |
| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
|
|