/ ˈæltruɪzəm; NAmE / noun
[ U ] ( formal ) the fact of caring about the needs and happiness of other people more than your own
► al·tru·is·tic / ˌæltruˈɪstɪk; NAmE / adjective :
altruistic behaviour
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WORD ORIGIN
mid 19th cent.: from French altruisme , from Italian altrui somebody else, from Latin alteri huic to this other.