DYAD (DIAD) By N., Pam M.S. - April 7, 2013 1. a pair of individuals. 2. Two people are closely interdependent mainly on an emotional level. See social dyad. DYAD (DIAD): "Joe and his wife were close and a dyad." Related Psychology Terms SOCIAL DYAD SOCIETY ANIMAL-ASSISTED THERAPY INTERLOCKING PATHOLOGIES SELF-CONSTRUAL BIOSOCIAL THEORY SOCIAL REHABILITATION SCHIZOID PERSONALITY DISORDER MODELING THEORY TOTAL INSTITUTION Cite this page: N., Pam M.S., "DYAD (DIAD)," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/dyad-diad/ (accessed August 8, 2020).