altruist

noun al·tru·ist \ ˈal-trü-ist \
Updated on: 11 Sep 2017

Definition of altruist

:one that adheres to or practices altruism: such as
a :an unselfish person whose actions show concern for the welfare of others
  • Kim signed up with Compass, a District-based group that serves the growing number of altruists who donate not only time and money to charity and the arts but also their professional expertise.
  • —Robert McCartney
b :an animal that behaves in a way which is not beneficial to or may be harmful to itself but which benefits the survival of others of its species
  • Reciprocal altruism refers to the exchange of beneficial acts between individuals, in which the benefits to the recipient exceed the cost to the altruist. … Although the potential for reciprocal altruism exists in many animal societies, most interactions occur between closely related individuals …
  • —Robert M. Seyfarth et al.

First Known Use of altruist

1868


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to conform or adhere

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