贺词 (hè cí) literally combines 贺 (hè), meaning 'to congratulate' or 'to celebrate', and 词 (cí), meaning 'words' or 'speech'. Together, it refers to a formal, written or spoken message delivered to express congratulations on a special occasion—such as a wedding, graduation, promotion, or national holiday. It is typically composed with care, often including auspicious phrases, respectful language, and warm wishes.

贺词 is commonly given by hosts, dignitaries, elders, or representatives at ceremonies and celebrations. While similar in function to a toast or congratulatory letter in English, 贺词 carries a stronger sense of formality, tradition, and cultural weight—especially when used in official or familial rites. It may be delivered orally or presented as a beautifully calligraphed scroll, and its tone is consistently positive, respectful, and uplifting.