D defs.my
Entry 2 senses Webster, 1913

Chronic

/krän'-ĭk/ · Chron·ic · IPA /ˈkɹɑ.nɪk/
01 a. Relating to time; according to time.
  1. 1.
    Relating to time; according to time.
  2. 2.
    Continuing for a long time; lingering; habitual.
Phrases & compounds
Chronic disease — one which is inveterate, of long continuance, or progresses slowly, in distinction from an acute disease, which speedly terminates.