hu·man·i·tar·i·an 
(hy-măn′ĭ-târē-ən)
(hy-măn′ĭ-târē-ən)n.
One who is devoted to the promotion of human welfare and the advancement of social reforms.
adj.
1. Showing concern for the welfare of humanity, especially in acting to improve the living conditions of impoverished people.
2. Being a situation in which many human lives are in danger of harm or death: The drought caused a humanitarian crisis.
hu·man′i·tari·an·ism n.