What does "habit" mean?

Additional senses

1. 2.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.
2. 3.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. -- 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.
3. 4.To inhabit. [Obs.] In thilke places as they [birds] habiten. Rom. of R.
4. 5.To dress; to clothe; to array. They habited themselves lite those rural deities. Dryden.
5. 6.To accustom; to habituate. [Obs.] Chapman.