"reinforcement" in the noun sense
1. support, reinforcement, reenforcement
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. reinforcement, reenforcement
information that makes more forcible or convincing
"his gestures provided eloquent reinforcement for his complaints"
3. reinforcing stimulus, reinforcer, reinforcement
psychology) a stimulus that strengthens or weakens the behavior that produced it
4. strengthener, reinforcement
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. reward, reinforcement
an act performed to strengthen approved behavior
Source: WordNet® (An amazing lexical database of English)
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