欢欣 is a literary and formal adjective meaning 'joyful' or 'elated', conveying a deep, uplifting sense of happiness—often in response to good news, success, or meaningful personal moments. The character 欢 means 'happy' or 'rejoice', while 欣 means 'pleased' or 'delighted'; together, they intensify each other, forming a compound that emphasizes heartfelt, radiant joy—not just momentary cheerfulness but sustained emotional uplift.

This word appears frequently in written Chinese: news reports celebrating national achievements, speeches, essays, and formal letters. It’s rarely used in casual daily speech (where people prefer simpler terms like 高兴 or 开心), but it’s common in published media, literature, and ceremonial contexts. It often modifies nouns (e.g., 欢欣的心情) or follows verbs like 充满 or 感到. Though grammatically an adjective, it can function adverbially in literary constructions (e.g., 欢欣地欢呼).