DEMAND By N., Pam M.S. - April 7, 2013 The internal or external condition that causes a need in an organism. Generally a urgent need or requirement. DEMAND: "The kidnapper sent his demand to the police." Related Psychology Terms BIOLOGICAL CLOCK BEHAVIOR GUSTATION DETERMINANT NERVOUS SYSTEM EXTERNAL BOUNDARY INTROJECTION DRUG DISCRIMINATION BIOLOGICAL RHYTHM RESTRICTED ENVIRONMENTAL STIMULATION Cite this page: N., Pam M.S., "DEMAND," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/demand/ (accessed July 21, 2019).