酒量 literally means 'alcohol quantity' — 酒 (jiǔ) means 'alcoholic beverage', and 量 (liàng) means 'capacity' or 'measure'. Together, they refer to a person's physiological tolerance for alcohol — how much liquor one can consume before becoming noticeably intoxicated. This term is commonly used in social contexts, especially during banquets, celebrations, or business dinners where drinking is customary.

Unlike medical terms like 'blood alcohol concentration', 酒量 is informal and subjective — it reflects personal experience and cultural perception rather than clinical measurement. People often compare or joke about each other’s 酒量 ('How’s your alcohol tolerance?'), and it may be influenced by factors like body weight, metabolism, drinking habits, or even genetics. It’s not used for non-alcoholic drinks or abstract concepts — strictly tied to human capacity for ethanol-containing beverages.