Source : Webster's Revised Unabridged Dictionary (1913)

Habit \Hab"it\n. [OE. habit, abit fr. habit fr. L. habitus
   state, appearance, dress, fr. habere to have, be in a
   condition; prob. akin to E. have. See {Have}, and cf. {Able},
   {Binnacle}, {Debt}, {Due}, {Exhibit}, {Malady.}]
   1. The usual condition or state of a person or thing, either
      natural or acquired, regarded as something had, possessed,
      and firmly retained; as, a religious habit; his habit is
      morose; elms have a spreading habit; esp., physical
      temperament or constitution; as, a full habit of body.

   2. (Biol.) The general appearance and manner of life of a
      living organism.

   3. Fixed or established custom; ordinary course of conduct;
      practice; usage; hence, prominently, the involuntary
      tendency or aptitude to perform certain actions which is
      acquired by their frequent repetition; as, habit is second
      nature; also, peculiar ways of acting; characteristic
      forms of behavior.

            A man of very shy, retired habits.    --W. Irving.

   4. Outward appearance; attire; dress; hence, a garment; esp.,
      a closely fitting garment or dress worn by ladies; as, a
      riding habit.

            Costly thy habit as thy purse can buy. --Shak.

            There are, among the states, several of Venus, in
            different habits.                     --Addison.

   Syn: Practice; mode; manner; way; custom; fashion.

   Usage: {Habit}, {Custom.} Habit is a disposition or tendency
          leading us to do easily, naturally, and with growing
          certainty, what we do often; custom is external, being
          habitual use or the frequent repetition of the same
          act. The two operate reciprocally on each other. The
          custom of giving produces a habit of liberality;
          habits of devotion promote the custom of going to
          church. Custom also supposes an act of the will,
          selecting given modes of procedure; habit is a law of
          our being, a kind of ``second nature'' which grows up
          within us.

                How use doth breed a habit in a man ! --Shak.

                He who reigns . . . upheld by old repute,

                Consent, or custom.               --Milton.

Habit \Hab"it\ (h[a^]b"[i^]t), v. t. [imp. & p. p. {Habited}; p.
   pr. & vb. n. {Habiting}.] [OE. habiten to dwell, F. habiter,
   fr. L. habitare to have frequently, to dwell, intens. fr.
   habere to have. See {Habit}, n.]
   1. To inhabit. [Obs.]

            In thilke places as they [birds] habiten. --Rom. of
                                                  R.

   2. To dress; to clothe; to array.

            They habited themselves lite those rural deities.
                                                  --Dryden.

   3. To accustom; to habituate. [Obs.] Chapman.

Source : WordNet®

habit
     n 1: an established custom; "it was their habit to dine at 7
          every evening" [syn: {wont}]
     2: a pattern of behavior acquired through frequent repetition;
        "she had a habit twirling the ends of her hair"; "long use
        had hardened him to it" [syn: {use}, {wont}]
     3: (religion) a distinctive attire (as the costume of a
        religious order)
     4: excessive use of drugs [syn: {substance abuse}, {drug abuse}]

habit
     v : put a habit on