A global citizen is a person who actively seeks to improve the general welfare of the international community.
A global citizen understands the importance of learning about world cultures and languages.
A global citizen is committed to using whatever knowledge, skills and talents she or he has to address current international issues (global poverty, environmental conservation, conflict resolution, political, economic, social development, etc.).
A global citizen stands firm for diversity, social justice, human rights, equity and empowerment for all while rejecting injustice of all kinds. (Definition from www.diversityabroad.com)