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Definition of altruism. 1  1 : unselfish regard for or devotion to the welfare of others charitable acts motivated purely by altruism. 2  2 : behavior by an animal that is not beneficial to or may be harmful to itself but that benefits others of its species.
A person-situation approach to altruistic behavior. Journal of Personality and Social Psychology, 51: 1001 â 1012. Google Scholar, Crossref: Rushton, J. P., Chrisjohn, R. D., Frekken, G. C. (1981). The altruistic personality and the self-report altruism scale. Personality and Individual Differences, 2: 293 â 302. Google Scholar, Crossref