Pronunciation: (rē"in-fôrs', -fōrs'), [key]
—v., -forced, -forc•ing,
1. to strengthen with some added piece, support, or material: to reinforce a wall.
2. to strengthen (a military force) with additional personnel, ships, or aircraft: to reinforce a garrison.
3. to strengthen; make more forcible or effective: to reinforce efforts.
4. to augment; increase: to reinforce a supply.
5. Psychol.to strengthen the probability of (a response to a given stimulus) by giving or withholding a reward.
1. something that reinforces.
2. a metal band on the rear part of the bore of a gun, where the explosion occurs. Also,reenforce,re-enforce.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.