'速食' literally combines '速' (sù), meaning 'fast' or 'swift', and '食' (shí), meaning 'food' or 'to eat'. Together, they form a compound noun meaning 'instant food' — meals or snacks designed for quick preparation and consumption, such as instant noodles, frozen microwave meals, or ready-to-eat rice bowls. It emphasizes speed and convenience over traditional cooking time and effort.

This term is commonly used in everyday contexts like supermarkets, online shopping, campus cafeterias, and health discussions about modern eating habits. While neutral in tone, it often carries subtle connotations of practicality — sometimes implying lower nutritional value or less freshness compared to home-cooked meals. It’s distinct from '快餐' (kuài cān, 'fast food'), which refers more broadly to restaurant-served quick meals, whereas '速食' focuses on pre-packaged, self-prepared items.