PREFIX By N., Pam M.S. - April 7, 2013 noun. With regard to language, a morpheme which is added to the start of a term to cultivate a derived form. PREFIX: "Prefix is the opposite of suffix." Related Psychology Terms ALLOMORPH ANAPHORA ISOLATING LANGUAGE NUMBER BOUND MORPHEME BOUND MORPHEME CONJUNCTION SIGN I AGENT CONTENT WORD Cite this page: N., Pam M.S., "PREFIX," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/prefix/ (accessed June 3, 2020).