1. the action of strengthening or supporting something
2. additional people or equipment sent to strengthen a military force or other group
Usage: military
3. the process of encouraging or establishing a pattern of behavior by rewarding it
Usage: psychology

Examples

• The bridge needed reinforcement after the earthquake.
• Military reinforcements arrived at the base yesterday.
• Positive reinforcement helps children learn good behavior.
• The concrete walls require steel reinforcement.
• The teacher used praise as reinforcement for correct answers.
• Additional reinforcement of the roof was necessary before winter.
• The army called for reinforcements during the battle.