reinforcement in WordNet English dictionary

1. a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission
   "they called for artillery support"
   support  reinforcement  reenforcement 
   
2. information that makes more forcible or convincing
   "his gestures provided eloquent reinforcement for his complaints"
   reinforcement  reenforcement 
   
3. an act performed to strengthen approved behavior
   reward  reinforcement 
   
4. a device designed to provide additional strength
   "the cardboard backing was just a strengthener"; "he used gummed reinforcements to hold the page in his notebook"
   strengthener  reinforcement 
   
5. (psychology) a stimulus that strengthens or weakens the behavior that produced it
   reinforcing stimulus  reinforcer  reinforcement