habit-n; 5 Senses

Sense Number 1: regular, customary behavior

Commentary: HABIT[+activity][+behavior][+personal][+customary]
NOTE: implies ongoing general behavior, not a single response to a stimulus (Sense 2)

He was a creature of habit who always dined at eight.
Johnny needs to improve his study habits in order to make good grades.
The couple stayed together largely from habit.
We should adopt her habit of an early morning walk.
This is a perennial shrub with spreading habit. (tends to spread as it grows)

WordNet 3.0 Sense Numbers: 1

Sense Number 2: automatic reaction to a stimulus

Commentary: HABIT[+action][+response][+automatic][+stimulated]
NOTE: implies an immediate response to a specific stimulus, not ongoing general behavior (Sense 1)

Cats land on their feet by habit, no matter how they are oriented in the air.
The girl finally broke her habit of chewing on her hair when she felt nervous.

WordNet 3.0 Sense Numbers: 2

Sense Number 3: identifying religious attire, clothing

Commentary: HABIT[+entity][+artifact][+clothing][+religious][+order]

The nuns in that order all wear white habits.
The habits of those nuns are knee-length dresses and a short head coverings.

WordNet 3.0 Sense Numbers: 3

Sense Number 4: drug addiction

Commentary: HABIT[+state][+addiction][+drug]

John's brother is rehabilitating from a cocaine habit.
Mary finally kicked the habit by using nicotine patches.
During the interview he spoke of his 18-year heroine habit.
Bob keeps candy bars in his desk drawer to feed his serious chocolate habit. (extension)

WordNet 3.0 Sense Numbers: 6

Sense Number 5: horseback riding attire

Commentary: HABIT[+entity][+artifact][+clothing][+riding][+horseback]

Sally wore a black habit and bowler in the equestrian competition.
The riding shop had hunting habits with red blazers on display in the window.

WordNet 0.0 Sense Numbers: 2a