habitual

Short definition from Wiktionary

Adjective

1. 1
   Of or relating to a habit; established as a habit; performed over and over again; recurrent, recurring.
2. 2
   Regular or usual.
3. 3
   Of a person or thing: engaging in some behaviour as a habit or regularly.
4. 4
   Pertaining to an action performed customarily, ordinarily, or usually.

Noun

1. 1
   One who does something habitually, such as a serial criminal offender.
2. 2
   A construction representing something done habitually.