Learner's definition of HABIT
1 : a usual way of behaving: something that a person does often in a regular and repeated way
— often followed by of + -ing verb
It was his habit to take a nap after dinner every evening.
It's important that parents teach their children good study/eating habits.
He fell/got into some bad habits after graduating from college.
It's never easy to break/kick a bad habit.
Old habits die hard. [=it is hard to stop doing things that you have been doing for a long time]
He had a habit of coughing when he was nervous.
He has an annoying/irritating habit of cracking his knuckles.
Things have a nasty habit of not turning out the way you expect them to. [=things often do not turn out the way you expect them to]
He still gets up early every day from habit.
She always closed the door softly out of habit.
He reached into his pocket for his keys by/from force of habit. [=he did it without thinking because it is what he usually does]
I'm a creature of habit. [=I always do the same things in the same way]
◊ If you are in the habit of doing something, you do it often or usually.
If you say that you are not in the habit of doing something, you mean that you do not do it or that you do not usually do it.
I'm not in the habit of getting involved in other people's arguments.
I'm not in the habit of making predictions, but I don't think there's much doubt about who will win this election.
To get in/into the habit of doing something means to do something in a regular or repeated way so that it becomes a habit.
To fall/slip into the habit of doing something is to begin to do something in a regular way without realizing that you are doing it.
If you make a habit of doing something or make it a habit to do something, you do it often.
They have made a habit of criticizing each other whenever possible.
The team has made a habit of winning the crucial games.
Yes, you can leave work early today, but don't make a habit of it.
2 [count] : a strong need to use a drug, to smoke cigarettes, etc. 3 [count] : a piece of clothing worn by members of a religious group