To make a broad statement or conclusion based on specific cases or instances. It's important not to generalize from a single experience.
To apply something, such as a concept or rule, to a wider range of situations or cases. The scientist attempted to generalize the findings of the study to the entire population.
Medicine: (of a disease or condition) to spread throughout the body or to become systemic. If left untreated, the rash may generalize and cover the entire body.