chronic
1. [ adjective ] (medicine) being long-lasting and recurrent or characterized by long suffering
Examples:

"chronic indigestion" "a chronic shortage of funds" "a chronic invalid"

Related terms: acute medicine prolonged degenerative
2. [ adjective ] having a habit of long standing
Synonyms: inveterate habitual confirmed
Examples:

"a chronic smoker"

Related terms: addicted
Similar spelling:   chronicle
  chorionic
  chronicler
  chromogen
  Chronister
  chariness