In*vet"er*ate (?), a. [L. inveteratus, p. p. of inveterare to render old; pref. in- in + vetus, veteris, old. See Veteran.]

1. Old; long-established. [Obs.]

It is an inveterate and received opinion.

2. Firmly established by long continuance; obstinate; deep-rooted; of long standing; as, an inveterate disease; an inveterate abuse.

Heal the inveterate canker of one wound.

3. Having habits fixed by long continuance; confirmed; habitual; as, an inveterate idler or smoker.

4. Malignant; virulent; spiteful. H. Brooke.

In*vet"er*ate (?), v. t. To fix and settle by long continuance. [Obs.] Bacon.

• To fix and settle by long continuance.
  
• Old; long-established.
  
• Firmly established by long continuance; obstinate; deep-rooted; of long standing; as, an inveterate disease; an inveterate abuse.
  
• Having habits fixed by long continuance; confirmed; habitual; as, an inveterate idler or smoker.
  
• Malignant; virulent; spiteful.
  
• casual