His final act of selflessness was to dive on top of his wife, sacrificing his life for hers.
They taught me selflessness, boldness, and investing in future leaders.
Their actions, their selflessness poses a challenge to each of us.
"devoted to others' welfare or interest and not one's own," 1825, from self + -less. First attested in Coleridge. Related: Selflessly; selflessness.