Source : Webster's Revised Unabridged Dictionary (1913)

Reinforcement \Re`in*force"ment\ (-ment), n.
   See {Re["e]nforcement}.

Source : WordNet®

reinforcement
     n 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" [syn: {support}, {reenforcement}]
     2: information that makes more forcible or convincing; "his
        gestures provided eloquent reinforcement for his
        complaints" [syn: {reenforcement}]
     3: (psychology) a stimulus that strengthens or weakens the
        behavior that produced it [syn: {reinforcing stimulus}, {reinforcer}]
     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"
        [syn: {strengthener}]
     5: an act performed to strengthen approved behavior [syn: {reward}]