OD 1 By N., Sam M.S. - 4 noun. a colloquial name for an overdose, most frequently of an opioid or a sedative. 2. verb. to overdose. 3. abbreviated form of organizational development. OD 1: "Fortunately, the ambulance arrived before the young woman could OD." Related Psychology Terms Piaget’s Theory of Cognitive Development ADOLESCENCE (Theories) NARCANNALTREXONE PMDD: Can It Be Cured? SCHIZOPHRENIA (OTHER TYPES) NALOXONE CHILD PSYCHOLOGY OBSESSRVE-COMPULSIVE REACTION OPIOID ABUSE OPIOID ANTAGONIST Cite this page: N., Sam M.S., "OD 1," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/od-1/ (accessed September 25, 2022).