noun (n)

• a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission(noun.act)

  Synonym:
  reenforcement, support
  

  source: wordnet30
• information that makes more forcible or convincing(noun.communication)

  Example:
  His gestures provided eloquent reinforcement for his complaints.
  

  Synonym:
  reenforcement
  

  source: wordnet30
• (psychology) a stimulus that strengthens or weakens the behavior that produced it(noun.cognition)

  Synonym:
  reinforcer, reinforcing stimulus
  

  source: wordnet30
• a device designed to provide additional strength(noun.artifact)

  Example:
  He used gummed reinforcements to hold the page in his notebook.
  

  Synonym:
  strengthener
  

  source: wordnet30
• an act performed to strengthen approved behavior(noun.act)

  Synonym:
  reward
  

  source: wordnet30
• See Reënforcement.(noun)

  source: webster1913