said esp of an illness: marked by long duration or frequent recurrence: compare acute1
suffering from a chronic disease
a chronic alcoholic
always present or encountered, esp constantly troubling
chronic financial difficulties
habitual; persistent
a chronic grumbler
Brit, informal bad; terrible
His singing is absolutely chronic
chronically adv
chronicity /kroʹnisiti/ noun
[French chronique from Greek chronikos of time, from chronos time]