habit

The definition of habit is something that you do regularly, or an addiction.

(noun)

Brushing your teeth every morning and every night is an example of a good habit.
Being addicted to heroin is an example of having a heroin habit.

See habit in Webster's New World College Dictionary

noun

Obsolete costume; dress
a particular costume showing rank, status, etc.; specif.,
1. a distinctive religious costume: a monk's habit
2. a costume worn for certain occasions: a riding habit
habitual or characteristic condition of mind or body; disposition
1. a thing done often and hence, usually, done easily; practice; custom
2. a pattern of action that is acquired and has become so automatic that it is difficult to break
a tendency to perform a certain action or behave in a certain way; usual way of doing
an addiction, esp. to narcotics
Biol. the tendency of a plant or animal to grow in a certain way; characteristic growth: a twining habit

Origin: ME < OFr < L habitus, condition, appearance, dress < pp. of habere, to have, hold < IE base *ghabh-, to grasp, take > give

transitive verb

See habit in American Heritage Dictionary 4

noun

a. A recurrent, often unconscious pattern of behavior that is acquired through frequent repetition.
b. An established disposition of the mind or character.
Customary manner or practice: a person of ascetic habits.
An addiction, especially to a narcotic drug.
Physical constitution.
Characteristic appearance, form, or manner of growth, especially of a plant or crystal.
a. A distinctive dress or costume, especially of a religious order.
b. A riding habit.