增高 (zēng gāo) is a verb meaning 'to grow taller' or 'to increase height'. It combines 增 (zēng), meaning 'to increase' or 'to add', and 高 (gāo), meaning 'tall' or 'height'. Together, they literally mean 'increase tallness', emphasizing a measurable rise in vertical dimension. The term is most commonly used in contexts related to human physical development—especially during adolescence—or in medical, nutritional, or fitness discussions about height enhancement.

While it can technically describe height increases in objects or structures (e.g., raising a platform), its dominant usage refers to people—particularly children and teenagers experiencing growth spurts, or adults seeking interventions like posture training, footwear, or (in some cases) medical treatments. It is neutral in register but often appears in health-related discourse rather than casual conversation; native speakers rarely say 增高 to describe everyday height changes—they might simply say 长高 (zhǎng gāo) for natural growth.