reinforcer reinforcement • reinform · · · Info · Definitions · Synonyms · Characters · · reinforcer · · Text Latin · · Script 10 · · Length Definitions · · · (noun) (psychology) a stimulus that strengthens or weakens the behavior that produced it. Synonyms: reinforcing stimulus, reinforcement. · · Noun Definition 1 Synonyms · · · reinforcing stimulus · · Synonym 1 reinforcement · · Synonym 2 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072