A habit is something that you do often or regularly.

A habit is an action which is considered bad that someone does repeatedly and finds it difficult to stop doing.

A drug habit is an addiction to a drug such as heroin or cocaine.

A habit is a piece of clothing shaped like a long loose dress, which a nun or monk wears.

If you say that someone is a creature of habit, you mean that they usually do the same thing at the same time each day, rather than doing new and different things.

If you are in the habit of doing something, you do it regularly or often. If you get into the habit of doing something, you begin to do it regularly or often.

If you make a habit of doing something, you do it regularly or often.

If someone has a particular habit of mind, they usually think in that particular way.