OPERANT By N., Pam M.S. - April 7, 2013 noun. a class of reactions which generate a shared impact on the surroundings. It is marked by its impact instead of by the specific form of behavior generating that impact. OPERANT: "The operant impact was hardly noticeable." Related Psychology Terms OPERANT BEHAVIOR PERFORMANCE ORTGEIST ORIGINAL CAUSE ACTIONAL VERB TYPE-TOKEN DISTINCTION VARIETY CROSS-TABULATION TITRATION AMBIEN Cite this page: N., Pam M.S., "OPERANT," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/operant/ (accessed September 22, 2019).