1. a person who acts with unselfish concern for the welfare of others

Examples

• The wealthy altruist donated millions to build schools in rural areas.
• She was known as an altruist who always put others’ needs before her own.
• The hospital was founded by a generous altruist who wanted to help the poor.
• Many volunteers are true altruists who expect nothing in return for their service.
• The altruist spent her weekends feeding the homeless downtown.
• He proved himself to be an altruist by giving away most of his inheritance to charity.