We found 39 dictionaries that define the word altruism:

General (25 matching dictionaries)

1. altruism: Merriam-Webster.com
2. altruism: Oxford Learner's Dictionaries
3. altruism: American Heritage Dictionary of the English Language
4. altruism: Collins English Dictionary
5. altruism: Vocabulary.com
6. Altruism, altruism: Wordnik
7. altruism: Cambridge Advanced Learner's Dictionary
8. altruism: Wiktionary
9. altruism: Webster's New World College Dictionary, 4th Ed.
10. altruism: The Wordsmyth English Dictionary-Thesaurus
11. altruism: Infoplease Dictionary
12. altruism: Dictionary.com
13. altruism: Online Etymology Dictionary
14. altruism: Cambridge Essential American English Dictionary
15. Altruism (biology), Altruism (ethical doctrine), Altruism (ethics), Altruism (philosophy), Altruism: Wikipedia, the Free Encyclopedia
16. Altruism: Online Plain Text English Dictionary
17. altruism: Webster's Revised Unabridged, 1913 Edition
18. altruism: Rhymezone
19. altruism: AllWords.com Multi-Lingual Dictionary
20. altruism: Free Dictionary
21. altruism: Mnemonic Dictionary
22. altruism: LookWAYup Translating Dictionary/Thesaurus
23. altruism: Dictionary/thesaurus

Art (2 matching dictionaries)

24. altruism: Dictionary of Philosophical Terms and Names
25. The Ism Book (No longer online)

Business (1 matching dictionary)

26. altruism: Legal dictionary

Computing (1 matching dictionary)

27. altruism: Encyclopedia

Medicine (4 matching dictionaries)

28. Medical Dictionary (No longer online)
29. online medical dictionary (No longer online)
30. Hypermedia Glossary Of Genetic Terms (No longer online)
31. altruism: Medical dictionary

Miscellaneous (2 matching dictionaries)

32. altruism: Political
33. altruism: Glosario de términos filosóficos (en inglés)

Religion (2 matching dictionaries)

34. Altruism: Catholic Encyclopedia
35. Irivng Hexham's Concise Dictionary of Religion (No longer online)

Science (1 matching dictionary)

36. FOLDOP - Free On Line Dictionary Of Philosophy (No longer online)

Slang (1 matching dictionary)

37. altruism: Urban Dictionary

(Note: See altruisms as well.)

Definitions from Wiktionary ( ) ▸ noun:  Regard for others, both natural and moral without regard for oneself; devotion to the interests of others; brotherly kindness. ▸ noun:  (biology, sociobiology) Action or behaviour that benefits another or others at some cost to the performer. Similar: selflessness, brotherly love, charity, benevolence, philanthropy, kindliness, love, beneficence, kindness, kindship, more... Opposite: selfishness, self-centeredness, egoism, narcissism Phrases: reciprocal altruism, Effective altruism, Competitive altruism, Effective Altruism Global, Pathological Altruism, more... Adjectives: reciprocal, pure, such, human, true, genuine, social, apparent, parental, universal, intergenerational Colors:     sky blue,     lavender,     mint green,     peach,     coral,     aqua,     periwinkle,     ivory,     lilac,     blush ▸ Word origin ▸ Words similar to altruism ▸ Usage examples for altruism ▸ Idioms related to altruism ▸ Wikipedia articles (New!) ▸ Popular adjectives describing altruism ▸ Words that often appear near altruism ▸ Rhymes of altruism ▸ Invented words related to altruism