[ 'altrʊɪz(ə)m ]
■ noun selfless concern for the well-being of others.
↘ Zoology behaviour of an animal that benefits another at its own expense.
Derivatives
altruist noun
altruistic adjective
altruistically adverb
Origin
C19: from Fr. ~e , from Ital. altrui 'somebody else', from L. alteri huic 'to this other'.