An irrational fear or hatred of people from other countries, cultures, or ethnic groups, often manifesting as anxiety, hostility, or discriminatory behavior. While not a formal psychiatric diagnosis, xenophobia can contribute to stress-related disorders and social dysfunction.
From Greek 'xenos' (stranger, foreigner) and 'phobos' (fear). First used in the early 20th century, the term evolved from describing individual fear to encompassing broader social and political attitudes toward outsiders.
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