‘大势’ literally combines ‘dà’ (big, great) and ‘shì’ (situation, force, momentum), together meaning the overarching, inevitable trend or prevailing direction of events — especially in social, economic, political, or historical contexts. It implies something larger than individual actions: a collective movement that shapes outcomes, like the rise of digital technology or shifting public attitudes.

This term is often used in formal or analytical speech and writing, such as news reports, policy discussions, or strategic planning. While ‘势’ alone can mean ‘trend’ or ‘momentum’, adding ‘大’ emphasizes scale, inevitability, and broad consensus. It’s rarely used for small-scale or personal matters — you wouldn’t say ‘大势’ to describe your lunch plans. Instead, it conveys weight and historical significance, frequently appearing with verbs like ‘认清’ (to recognize clearly) or ‘顺应’ (to adapt to).