Definition of altruism
1
: unselfish regard for or devotion to the welfare of others
charitable acts motivated purely by altruism
2
: behavior by an animal that is not beneficial to or may be harmful to itself but that benefits others of its species
Test Your Vocabulary
Which Word Does Not Belong?
-

- Which of these words does not mean "nonsense"?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged











Share altruism
Time Traveler for altruism
The first known use of altruism was in 1853
See more words from the same year