- adjective used for describing a disease or condition that lasts for a long time.
- adjective used for describing severe pain
(written as Chronic)Long-lasting. The US National Center for Health Statistics defines it as of three or more months' duration.
- adjective referring to serious pain
- adjective excellent, powerful. One of many appropriations of negative words as vogue terms of approbation in adolescent speech, such as bad, wicked, brutal, etc. Chronic appeared in the late 1990s.