Added 8 October 2026 self-interest noun Categories: Describing WordsObscure Words noun ! Definition from Wiktionary (CC BY-SA). More about self-interest at Wordnik → Where our words come from → One's personal interest or advantage, especially when pursued without regard for others. I cannot abandon my husband for the sake of self-interest and personal gain. Related Words: self-seekingegoismself-centerednessegocentrismexpedienceopportunismself-concernselfishnessegocentricityegotismconcernexpediency Back to today's word