Noun
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"2. information that makes more forcible or convincing;
"his gestures provided eloquent reinforcement for his complaints"3. (psychology) a stimulus that strengthens or weakens the behavior that produced it
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"5. an act performed to strengthen approved behavior